Html injection to ssrf. PDF Files for Pentesting.
Html injection to ssrf. Feb 21, 2024 · { char* github = "https://github. Once we can execute code on the victim’s machine, we can SSRF can happen when an attacker is able to control the input parameters and can inject malicious URL/domain/path. The sanitization was enough to prevent Dec 15, 2020 · What is a Server Side Request Forgery Attack? Server-Side Request Forgery, also known as SSRF refers to an attack which lets an attacker send crafted requests from the back-end server of a vulnerable web application. May 30, 2023 · In past, I read a blog on SSRF using PDF Generation by Nahamsec’s “ Owning the cloud through SSRF and PDF generators ”. Feb 12, 2025 · Learn about Server-Side Request Forgery (SSRF), its attack methods, real-world examples, and prevention techniques with a practical approach. Known as HTML injection, this issue can escalate into stored Cross-Site Apr 13, 2023 · For example, an attacker can inject this payload into a vulnerable application to view the open ports and active connections on the target system. com/NullC0d3"; printf("Try, exceptions exist for a reason"); printf(" 🛡️ NightHosting https://discord. Server-Side Request Forgery (SSRF) Introduction Server-Side Request Forgery (SSRF) is a web vulnerability that allows an attacker to make unauthorized requests from a vulnerable server. This write-up presents all the steps to exploit this vulnerability with dangling markup. The attacker targets an application that supports data imports from URLs or allows them to read data from URLs. SSRF is an OWASP Top 10 web vulnerability. It may be an Internal SSRF, Cloud Metadata SSRF or simply an External SSRF. I've successfully crafted an injection that can perform an SSRF a tack on a PDF rendered server-side. This vulnerability could be exploited to execute arbitrary scripts in the context of the user's browser, leading to cross-site scripting (XSS) attacks and other malicious activities. SSRF is often leveraged to escalate Jan 30, 2023 · Fun little CSS injection turned full-read SSRF thanks to an (imo) overly powerful PDF generator. This cheat sheet will focus on the defensive point of view and will not explain how to perform this attack. Summary Methodology Edge Side Inclusion References Methodology SSI Jan 20, 2025 · Closing Thoughts SSRF, XSS, and CSRF are powerful vulnerabilities that exploit different layers of web applications. , Redis, Elasticsearch) allow unauthenticated data writes or command execution when accessed directly. Jul 26, 2021 · Hi, I found SSRF in your APP POC: https://petstore. In this first example, we’ll be able to see the final PDF and all of the elements we insert. This article covers the essential concepts behind SSRF and highlights the methodology and automation techniques I used to streamline the process. Template-based generation Basic Information A Server-side Request Forgery (SSRF) vulnerability occurs when an attacker manipulates a server-side application into making HTTP requests to a domain of their choice. jpg> Fake Login page This module covers three injection attacks: XPath injection, LDAP injection, and HTML injection in PDF generation libraries. An open API service indexing awesome lists of open source software. If the backend processes these files, SSRF might be hiding here. The SSRF result is due to a mis-configuration on your site, it can be mitigated using the cURL settings provided in the site admin HTTP Security settings (potentially along with configuring your internal firewall). These malicious requests can span multiple destinations, which include internal APIs, HTML pages, or databases: Here, we can see that the attacker first sends a crafted HTTP request to the vulnerable app, which then accesses the target application. Apr 28, 2011 · Cross-Site Scripting (XSS), Cross-Site Request Forgery (CSRF), SQL Injection and HTML Injection are security flaws that have been around for years. As the name suggest in one you inject HTML tags and the other you try to inject and execute javascript somehow. Dec 12, 2024 · Chaining XXE with SSRF In the next exercise, it asks us to make an internal petition which we can use to scan for internal ports in the server by using SSRF. In this section we will look into web application attacks and security. An attacker could exploit SSRF to interact with these services, injecting malicious payloads like web shells or manipulating application state. Discover real-world examples and actionable recommendations for cybersecurity professionals. . Learn more here. be made to make external requests. Consider performing validation on any content going into PDFs to ensure you can't inject PDF code. For instance, an attacker could use an image URL or a link URL as input in template generation, or use a file/directory path or an image URL in system/device configuration. It will also parse any description field from the API specification as a markdown. 8), and other security bugs. SSRF is commonly used by attackers to target internal networks that are behind firewalls and can not be reached from the external network. Let’s get started ! Common SSRF attacks are exploitable due to hostname being accepted from user-controlled input. **POC** 1 May 16, 2022 · Swagger UI will take your config (JSON) or API specification (YAML), fetch it, and then it will render it. Jan 4, 2020 · Exploiting XML External Entity (XXE) Injections XXE injection is a type of web security vulnerability that allows an attacker to interfere with the way an application processes XML data Payloads All The Things, a list of useful payloads and bypasses for Web Application Security May 12, 2018 · Overview wkhtmltopdf is a widely used open source pdf and image rendering utility. Nov 8, 2023 · Vulnerability Html injection in Swagger-UI Proof Of Concept During the recon process, I found that this Link is vulnerable to HTML injection POC attachments:- <screen02. They let you add dynamically generated content to an existing HTML page, without having to serve the entire page via a CGI program, or other dynamic technology. Note how if4 is considered to have null / A1 - Injection / HTML Injection - Reflected (GET) HTML Injection - Reflected (POST) HTML Injection - Reflected (Current URL) HTML Injection - Stored (Blog) iFrame Injection LDAP Injection (Search) Mail Header Injection (SMTP) OS Command Injection OS Command Injection - Blind PHP Code Injection Server-Side Includes (SSI) Injection SQL Aug 30, 2024 · 2. in/ddP4mmV5 #bugbounty #bugbountytips #bugcrowd | 40 XML external entity (XXE) injection In this section, we'll explain what XML external entity injection is, describe some common examples, explain how to find and exploit various kinds of XXE injection, and summarize how to prevent XXE injection attacks. io/?url=https://uom82y8q7xslv8n9mbqzxl33yu4ks9. To capture a HTTP or As part of the Application Security Assessment, we have come across the vulnerability Server Side Request Forgery (SSRF) using HTML Injection, via PDF and image generator. Host Header Injection Host Header Injection is an attack that exploits the vulnerability in how web servers and applications process the Host header in HTTP Jul 19, 2020 · HTML Injection to blind SSRF testing retrieves only DNS Query Ask Question Asked 5 years, 2 months ago Modified 5 years, 2 months ago Oct 14, 2024 · Welcome to this write-up, where I’ll walk you through how I reported multiple SSRF (Server-Side Request Forgery) vulnerabilities, external service interactions, and open redirects using my custom tool, 0dSSRF. As the vulnerability name suggests, an adversary forces a vulnerable web server to access The post PDF Generator’s Eternal Bond with SSRF appeared first on WeSecureApp :: Simplifying Enterprise Security!. Finally, the response from the target Discover what to know about server-side request forgery (SSRF), including what it is, how it relates to application security, and answers to common questions. May 6, 2025 · Unravel the complexities of SSRF 2025. Explore how to exploit SSRF with example cases. Web applications are everywhere today, and they are used to control just about everything you can imagine. Exploit Assume a web application defines User struct, GetFile method, and ExecuteCmd method. HTML Injection to SSRF Vulnerability in ManageEngine This POC is published only for educational purposes. Oct 6, 2024 · Imagine an application that lets users upload files — things like PDFs, SVGs, or even Office documents. 1. Oct 28, 2020 · HTML injections are less dangerous than XSS but they may still be used for malicious purposes. The attacker can manipulate server-side requests to access internal systems, databases, or sensitive files, which are otherwise inaccessible from outside the network. Contribute to luigigubello/PayloadsAllThePDFs development by creating an account on GitHub. Jul 20, 2022 · SSRF is an attack that allows attackers to send malicious requests to another system through a vulnerable web server. Feb 12, 2023 · Unsanitized input will mostly result in HTML injection, JavaScript Injection, SSRF and Reading of critical local files etc. Apr 17, 2023 · Cross-Site Scripting, better known as XSS in the cybersecurity community, is classified as an injection attack where malicious JavaScript gets injected into a web application with the intention of Dec 9, 2024 · “SSRF vulnerabilities are like giving your server a GPS and hoping it doesn’t take a wrong turn — without proper safeguards, it might end… Mar 4, 2024 · HTML injection occurs when an attacker injects malicious HTML or JavaScript code into a web page, exploiting vulnerabilities in input validation and sanitization. In the current example, our target application was vulnerable to Server Side Request Forgery (SSRF) attack via HTML injection in PDF download feature. Nov 13, 2023 · Create an HTML file that performs a GET request to internal. When an application concatenates user-controlled input into a string that is later parsed by the LESS compiler, an attacker can inject arbitrary LESS code. What is XML external entity injection? XML external entity injection (also known as XXE) is a web security vulnerability that allows an Automation of these processes can be facilitated by tools such as SQLMap, which supports UDF injection, and for blind SQL injections, output redirection or DNS request smuggling techniques may be utilized. app. Summary DNS AXFR FastCGI Memcached MySQL Redis SMTP WSGI Zabbix References DNS AXFR Query an internal Hi, There is SSRF vulnerability due to img tag injection in career form. An attacker can use this vulnerability to construct a URL that, if visited by another application user, will modify the action URL of a form to point to the attacker's server. Do note that we discussed in this blog cannot be called a direct SSRF attack but is SSRF using XSS. HTML Injection also known as Cross Site Scripting. This vulnerability exposes the server to arbitrary external requests directed by the attacker. On this post i will share how to escalate a HTML Injection to Data Steal. An SSRF, privileged AWS keys and the Capital One breach This Jun 11, 2025 · Protect your website from malicious attacks by understanding HTML injection. local to get RCE via SSRF: 💡To know how we got the used parameter for gaining RCE on the current service (internal. Cross-site scripting (XSS) vulnerabilities can be used by Summary HTML injection is a type of injection vulnerability that occurs when a user is able to control an input point and is able to inject arbitrary HTML code into a vulnerable web page. HTML Injection Definition: HTML Injection is a security vulnerability where an attacker can inject malicious HTML code into a web application. This will enable browser to turn on its XSS protection feature ( if present ) . Capture SSRF The first thing you need to do is to capture a SSRF interaction generated by you. I want to give you a simple mental snapshot of what is going on when a PDF is generated in a web application. If you access the previous html via a http server (like python3 -m http. Aug 13, 2025 · What Is SSRF? A Server-Side Request Forgery (SSRF) attack involves an attacker abusing server functionality to access or modify resources. Secure your apps with expert insights. , the parent won’t be able to access the secret var inside any iframe and only the iframes if2 & if3 (which are considered to be same-site) can access the secret in the original window. SSRF vulnerabilities occur when the Nov 20, 2024 · A newly discovered security vulnerability in web applications reveals the dangers of untrusted user input handling. Server Side Include Injection Server Side Includes (SSI) are directives that are placed in HTML pages and evaluated on the server while the pages are being served. The value was reflected into the `color` property with minimal sanitization. There are three main types of XSS attacks: Stored XSS, Reflected XSS, and DOM-based XSS. Attackers often inject malicious JavaScript, VBScript, ActiveX, and/or HTML into vulnerable applications to deceive the user in order to gather data from them. Feb 14, 2008 · List of payloads and wordlists that are specifically crafted to identify and exploit vulnerabilities in target web applications. local May 5, 2025 · A surge in cyberattacks leveraging email input fields as a gateway to exploit a wide range of vulnerabilities, including Cross-Site Scripting (XSS), Server-Side Request Forgery (SSRF), and email header injection. XSS Payload Collection Overview Cross-Site Scripting (XSS) is a type of security vulnerability typically found in web applications. How? Jan 1, 2019 · Second aspect is instructing HTML clients about possible XSS attacks ( if we know for sure that API client is going to be HTML / UI ) then we need to add X-XSS-Protection header & that would be done by below code. burpcollaborator. If a malicious user can […] An open API service indexing awesome lists of open source software. These injected scripts execute 3 Vulnerabilities - XSS -> SSRF, HTML Injection, CSRF Moderate marcelfolaron published GHSA-92xh-6x7v-4rmq on Feb 18 Package HTML Injection Html Injection File Read Linux Sensitive Files Media Type (MIME) OS Command Injection (Unix) OS Command Injection (Windows) PHP Code Injection-Payloads PHP Code injection SQL Injection SQL Injection Authentication Bypass SQLi Query Join and Break Server Side Request Forgery (SSRF) Windows Sensitive Files XML External Entity (XXE) Jan 28, 2025 · If user-controllable input is directly concatenated to the HTML template, without proper sanitization, it may be susceptible to HTML injection which in most cases can be further escalated to server-side request forgery (SSRF), local file disclosure (LFD) and other vulnerability types. While XPath and LDAP injection vulnerabilities can lead to authentication bypasses and data exfiltration, HTML injection in PDF generation libraries can lead to Server-Side Request Forgery (SSRF), Local File Inclusion (LFI), and other common web vulnerabilities. Abusing Caching Servers into SSRF and Client-Side Attacks While conducting a security assessment, we noticed an unexpected behavior in the markup language Edge Side Includes (ESI), a language used in many popular HTTP surrogates (reverse […] One type of injection attack is called Server-side Request Forgery (SSRF). , to name a few of the security issues that can arise out of it. Jul 21, 2023 · Once you’ve achieved HTML injection on it, you can most certainly escalate it to XSS or SSRF and chain further vulnerabilities to it to make it more impactful in nature. Dec 10, 2020 · As a developer, you can use the injections mentioned in this paper to confirm that any user input doesn't cause PDF injection. Oct 22, 2024 · 3) Server-side request forgery (SSRF) Some server-side request forgeries can be further escalated to achieve remote code execution. This vulnerability can have many consequences, like disclosure of a user’s session cookies that could be used to impersonate the victim, or, more generally, it can allow the attacker to modify the page HTML Injection Html Injection File Read Linux Sensitive Files Media Type (MIME) OS Command Injection (Unix) OS Command Injection (Windows) PHP Code Injection-Payloads PHP Code injection SQL Injection SQL Injection Authentication Bypass SQLi Query Join and Break Server Side Request Forgery (SSRF) Windows Sensitive Files XML External Entity (XXE) Jan 15, 2015 · Hi, I was trying out the Swagger UI, and I noticed that the swagger. Today, I’m going to walk you Aug 1, 2024 · Learn how to identify and hunt for advanced Server-Side Request Forgery (SSRF) vulnerabilities using several different testing methods. As the browser doesn’t know if the page is trusted or not, it will execute and parse all the parts of the page. description value allows HTML, which could lead to an XSS injection (if that description string is maliciously manipulate During a recent application vulnerability assessment we found a Stored HTML Injection vulnerability that was quickly escalated to a full Server Side Request forgery (SSRF) on a AWS EC2. Server-side request forgery (SSRF) is a type of attack that allows an adversary to make arbitrary outbound requests from a server. - InfoSecWarrior/Offensive-Payloads Apr 11, 2019 · Better Exfiltration via HTML Injection This is a story about how I (re)discovered an exploitation technique and took a bug with fairly limited impact to a 5 digit bounty by bypassing existing … Apr 4, 2022 · Server-Side Request Forgery (SSRF) attacks allow an attacker to make requests to any domains through a vulnerable server. net Oct 15, 2024 · Justin Benjamin from Cyber Advisors demonstrates a recent penetration testing case study of a PDF Server-Side Request Forgery (SSRF) exploitation. From the user-agent header I figured out that the app was using PhantomJs to generate the pdf, which had a well documented SSRF vulnerability. May 30, 2021 · When SSRF is identified in applications using modern frameworks or protected by a WAF, additional effort is often needed to bypass the filtering or security mechanisms in place, in order to successfully exploit the vulnerability. URLs can be manipulated, either by replacing them with new ones or by tampering with URL path traversal. This is often used maliciously to gain access to internal networks, local systems, or facilitate other types of attacks. PDF Files for Pentesting. Typically, attackers supply a URL (or Discover what to know about HTML injection, including what it is, how it relates to application security, and answers to common questions. If a user submits the form then its contents, including any input from the victim user, will May 8, 2025 · Host Header Injection in SSRF (Server-Side Request Forgery) When internal SSRF filters rely on the Host header for validation, attackers can forge internal requests or bypass SSRF protections. Confirm if the application is try to load an iframe by using already found HTML Injection. Overview of available payload generators for penetration testing. Update now to protect against exploits. We will Mystery lab challenge Try solving a random lab with the title and description hidden. Mar 18, 2025 · Server-side request forgery (SSRF): risks, exploits like localhost attacks, and prevention tips. Because wkhtmltopdf renders HTML content on the server-side, it is a high risk target for both Server-side Request Forgery (SSRF) and Local File Inclusion (LFI) vulnerabilities. Description HTML Injection is an attack that is similar to Cross-site Scripting (XSS). Attacker can inject multiple tags and perform multiple requests on remote hosts. swagger. A successful SSRF attack can grant the attacker access to restricted actions, internal services, or internal files within the application or the organization. See a common vulnerability found in a pentest, iframe injection. in/ddP4mmV5 #bugbounty #bugbountytips #bugcrowd | 40 Dec 10, 2022 · An automated tool for discovering vulnerabilities in GraphQL applications through fuzzing techniques, including OS Command Injection and XSS, with a focus on OWASP Top Ten vulnerabilities. Discovered by an intern with just four months’ infosec industry experience, the findings emerged from an ambitious project that One type of injection attack is called Server-side Request Forgery (SSRF). Apr 3, 2018 · Update: A new blog post has been published as a follow up to this article : ESI Part 2: Abusing specific implementations. The Nov 21, 2024 · Gain insights into injection vulnerabilities, the different classifications, and potential security bypass techniques. While in the XSS vulnerability the attacker can inject and execute Javascript code, the HTML injection attack only allows the injection of certain HTML tags. By abusing @import (inline) the attacker can force the server to retrieve: Local files via the file:// protocol (information disclosure / Local File Inclusion). Jan 10, 2019 · First things first What is SSRF? Server Side Request Forgery (SSRF) refers to an attack where in an attacker is able to send a crafted request from a vulnerable web application. If you have found an HTML Injection vulnerability that allows you to load <iframe>, <img> or similar tag and the application is utilizing "Cloud Services" such as "AWS", it is possible to escalate the finding to perform "Cloud Metadata SSRF". Jun 21, 2021 · These two things can be used to escalate an HTML Injection into an SSRF attack which can undermine the privacy of the server. server) you will notice that all the scripts will be executed (as there is no CSP preventing it). Read the article now! Jan 11, 2024 · Before getting into the nuts ‘n’ bolts of how to find and exploit SSRF bugs in PDF generators, let’s go through a quick thought experiment. May 28, 2024 · In short, SSRF is an attack that lets an attacker trick a web server into accessing private resources. com html injection to server-side request forgery (ssrf) vulnerability occurs when an application improperly processes Mar 25, 2019 · 0 HTML injection and XSS injection are not the same. Sep 24, 2019 · Greetings everyone, this blog post is about the vulnerability that I have identified in Wkhtmltopdf gem, which was allowing users to inject HTML in the pdf files, and after doing further research, I was able to identify that the parser's functionality was vulnerable to internal SSRF attack, which further allowed me to read server's local file. Feb 21, 2023 · During a web penetration test, we discovered an HTML injection. Jul 3, 2021 · SSRF to Local File read through HTML injection in PDF file In one of the recent web application security assessment, I came across an interesting find that allowed me to escalate… Hi team, I hope you're doing well. Let’s look at some code and see how it’s done - here is a helper function that is used to render Markdown in Swagger UI: Examples SSRF also open a gate to various NoSQL attacks such as Server-Side JavaScript injections. Nov 16, 2021 · In a Server-Side Request Forgery (SSRF) attack, the attacker can read or update internal resources. You'll learn how to embed files within a PDF and extract them using zlib. It allows attackers to inject malicious scripts into web pages viewed by other users. Understand the types of HTML injection, examples of attacks, their impact, and mitigation measures such as input validation and encoding to prevent these vulnerabilities. g. PDF Generator Finding SSRF via HTML Injection inside a PDF file on AWS EC2 Sometimes when browsing a website you will even see certain parameter names such as url=, targetUrl=, requestUrl=, path=. It is a security vulnerability that allows an attacker to inject HTML code into web pages that are viewed by other users. May 14, 2024 · Once you have confirmed that it is possible to inject HTML and JavaScript into the document for the server to run, what else is achievable? Local File Inclusion “The File Inclusion vulnerability allows an attacker to include a file, usually exploiting a “dynamic file inclusion” mechanisms implemented in the target application. In some cases, an attacker can use SSRF to pivot throughout corporate networks, exploit otherwise unreachable internal systems, or query metadata endpoints to extract secrets. When used improperly, this utility can introduce high risk security vulnerbilities. You can try uploading files with embedded URLs pointing to internal services (Reference: The PDF Trojan Horse: Leveraging HTML Injection for SSRF and Internal Resource Access). We test a lot of applications hosted in AWS, especially on EC2. The severity of SSRF can vary from informational to critical depending on some factors Routing-based SSRF It is sometimes also possible to use the Host header to launch high-impact, routing-based SSRF attacks. Learn how a pentest program helps with Cobalt's Pentest as a Service platform. html. Apr 5, 2020 · During a recent application vulnerability assessment we found a Stored HTML Injection vulnerability that was quickly escalated to a full Server Side Request forgery (SSRF) on a AWS EC2. However, in the scenario that we saw above XSS can be weaponized to create custom payloads in order to perform lot of complex SSRF attacks. This page provides a comprehensive collection of XSS payloads for each type, including Oct 25, 2024 · SQL Injection -> RCE Host Header Injection + Password Reset Host Header Injection + SSRF LFI + Log Poisoning -> RCE Conclusion CSRF + XSS CSRF and XSS vulnerabilities can be used together to redirect a victim to unwanted actions. These are sometimes known as "Host header SSRF attacks", and were explored in depth by PortSwigger Research in Cracking the lens: targeting HTTP's hidden attack-surface. In this lab, you'll explore a Server Side Request Forgery (SSRF) vulnerability using Weasyprint to gain unauthorized access to internal resources by crafting a malicious HTML page. We will cover how to identify, exploit, and prevent each of these injection attacks. If you are able to inject HTML you can deface a website but if you inject javascript you could do pretty much anything a real user can do. * Swagger UI is a tool for visualizing Mar 26, 2024 · By exploiting SSRF, attackers can send requests to both external and internal servers, bypassing security measures. gg/y Jun 16, 2021 · A file upload functionality that may allow the use of files such as HTML or SVG files, or allows uploading a file through a URL or through using various components as a part of restriction bypass can lead to an impactful Server-Side Request Forgery. SSRF makes these requests originate from within a server itself, which typically has broader access than an external client. Get Free GPT4o from https://codegive. Oct 31, 2022 · There are many endpoints, functionalities and different ways to look at an SSRF vulnerability but today I will talk about only looking for SSRF through HTML Injection and more specifically HTML Jul 11, 2025 · How I Escalated Simple HTML Injection to SSRF via PDF Rendering hello everyone, it’s been a while since I wrote something here, but yeah, I guess I’m back. Oct 20, 2020 · Infosec intern assailed eight open source libraries in 11 different ways Five popular open source libraries used to convert HTML files to PDF documents are vulnerable to server-side request forgery (SSRF), directory traversal, and denial-of-service (DoS) attacks. When a user’s web browser renders this injected Mar 28, 2024 · What is Server-Side Request Forgery vulnerability? Server-side request forgery (SSRF) occurs when a web application fetches a remote resource without properly validating the user-supplied URL. Understanding how they work is crucial for both developers and security Form action hijacking vulnerabilities arise when an application places user-supplied input into the action URL of an HTML form. Server Side Request Forgery or SSRF is a vulnerability in which an attacker forces a server to perform requests on their behalf. A list of useful payloads and bypass for Web Application Security and Pentest/CTF - swisskyrepo/PayloadsAllTheThings If a website uses a web framework written in Golang and uses html/template module for parsing a template file or strings, we may inject this template with our custom template file/string. Getting into it, the CSS injection was straight forward, there was a configuration option for the color of text, this color was reflected directly into the page's CSS (for the PDF). In this section we explain what server-side request forgery (SSRF) is, and describe some common examples. As you'll have no prior knowledge of the type of vulnerability that Just dropped a new write-up about how escalated a simple html injection to ssrf via pdf rendering Here is the full write-up : https://lnkd. Learn about HTML injection attacks, a security vulnerability that allows attackers to inject malicious HTML code into web applications, potentially leading to data theft, phishing, or malware insertion. Escalating an SSRF to RCE by leveraging an internal service: Internal services Feb 10, 2025 · Zimbra has patched CVE-2025-25064, a critical SQL injection flaw (CVSS 9. May 16, 2025 · HTML injection occurs due to improper sanitization of user input and improper encoding of output. Thank you gp_sec #poc #bugbounty #cybersecurity #tech #linux Chain: LLM integration framework has prompt injection (CWE-1427) that allows an attacker to force the service to retrieve data from an arbitrary URL, essentially providing SSRF (CWE-918) and potentially injecting content into downstream tasks. Imagine that you saved a very basic web page into an HTML file on your desktop and named it ssrf. This injection vulnerability allows an attacker to inject or send a malicious HTML page to the end users. Jan 31, 2022 · As part of the Application Security Assessment, we have come across the vulnerability Server Side Request Forgery (SSRF) using HTML Injection, via PDF and image generator. apiInfo. Just dropped a new write-up about how escalated a simple html injection to ssrf via pdf rendering Here is the full write-up : https://lnkd. I immediately discovered an html injection here. If you are new to this, we recommend reading couple of them before continuing. Jan 21, 2024 · In our lab, we know that the application is vulnerable to HTML injection. When an application does not properly handle user supplied data, an attacker can supply valid HTML code, typically via a parameter value, and inject SSRF Advanced Exploitation Some services (e. Selecting one of the formats, I was able to embed iframes and get a pingback to my server, but could not get the response to load in the PDF no matter what. Conclusion Vulnerable libraries can make user input inside PDFs dangerous by not escaping parentheses and backslashes. We also show you how to find and exploit SSRF Sep 15, 2025 · Server‑Side Request Forgery (SSRF) is a vulnerability that allows an attacker to make network requests to arbitrary destinations. May 30, 2023 · HTML Injection vulnerabilities can also be used to carry out XSS attacks by injecting JavaScript code to be executed on the client side. This talk from the security researcher Orange Tsai as well as this document provide Jan 27, 2025 · If user-controllable input is directly concatenated to the HTML template, without proper sanitization, it may be susceptible to HTML injection which in most cases can be further escalated to server-side request forgery (SSRF), local file disclosure (LFD) and other vulnerability types. Is important to note that the victim must be logged-in in the vulnerable application in order for the attacks to be Found SSRF in PDF Converter via HTML Injection! 💥 While testing a PDF generation feature that converted user HTML to PDF, I discovered an SSRF (Server-Side Request Forgery). Apr 8, 2020 · If an application or a service, accepts a user controlled URL, IP address or hostname and fetches data from this, the application could potentially be vulnerable to SSRF. SQL Injection (SQLi) payloads SQL Injection (SQLi) is a type of web application vulnerability that allows an attacker to execute malicious SQL statements against a database. An HTML Injection vulnerability was discovered in the Swagger UI, which could potentially allow attackers to inject malicious HTML content. Stay safe by learning how it works and ways to prevent it. The web page uses JavaScript to fetch Server-Side Request Forgery Prevention Cheat Sheet Introduction The objective of the cheat sheet is to provide advices regarding the protection against Server Side Request Forgery (SSRF) attack. I've also managed to read the contents of files from the same domain, even when the Acr An open API service indexing awesome lists of open source software. This is usually done by 1) leveraging an internal service that supports command execution or 2) exposing environment secrets that allow you to later authenticate and gain access to it. yfhmq lsghm gmgcwzkv zicrqeo mkxkxh mdpexvtes raz chq hjfc iuqvmcb