Source: cve@mitre.org
Cross-site scripting (XSS) vulnerability in the Wir ber uns (fsmi_people) extension 0.0.24 and earlier for TYPO3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Cross-Site Scripting (XSS) vulnerability in the Wir ber uns (fsmi_people) extension for TYPO3 allows attackers to inject malicious scripts into web pages viewed by other users. This can lead to account compromise, data theft, and website defacement. The vulnerability affects versions 0.0.24 and earlier, making it a potential target for exploitation.
Step 1: Payload Delivery: The attacker crafts a malicious payload containing JavaScript or HTML code. This payload is designed to perform actions like stealing cookies, redirecting users, or defacing the website.
Step 2: Input Injection: The attacker injects the payload into the vulnerable application, typically through a form field or a URL parameter. The specific vector is unspecified in the CVE description, but common XSS vectors include input fields for names, comments, or search queries.
Step 3: Data Storage/Persistence (if applicable): If the XSS is stored (e.g., in a comment section), the payload is stored in the application's database or file system.
Step 4: Victim Interaction: A legitimate user visits a page containing the attacker's injected payload. This could be a page with a malicious comment or a crafted URL.
Step 5: Payload Execution: The victim's browser executes the attacker's JavaScript code. This code can then perform actions on behalf of the victim, such as stealing their session cookies, redirecting them to a phishing site, or modifying the website's content.
The root cause of CVE-2008-5799 is a failure to properly sanitize user-supplied input before rendering it in the web page. Specifically, the fsmi_people extension likely processes user input (e.g., from form fields or URL parameters) without adequate input validation or output encoding. This allows attackers to inject HTML or JavaScript code into the application. When a victim views a page containing the malicious script, their browser executes the attacker's code, potentially leading to various malicious outcomes. The lack of contextual escaping is the primary flaw.
Due to the age of the vulnerability, it's unlikely to be directly associated with specific APT groups in current reports. However, any threat actor targeting TYPO3 installations could potentially leverage this vulnerability. The vulnerability is not listed on the CISA KEV at this time.
Web Application Firewall (WAF) logs showing suspicious HTTP requests containing JavaScript or HTML tags in user input fields.
Intrusion Detection System (IDS) alerts triggered by XSS payloads in network traffic.
Server-side logs indicating unusual activity, such as unexpected redirects or modifications to website content.
Browser developer tools showing unexpected JavaScript execution or modifications to the DOM (Document Object Model).
Reviewing web server access logs for unusual URL parameters containing potential XSS payloads.
Upgrade the fsmi_people extension to a patched version (0.0.25 or later) or the latest available version.
Implement input validation to sanitize all user-supplied data, ensuring that only expected data types and formats are accepted.
Employ output encoding (e.g., HTML encoding) to escape special characters in user-supplied data before rendering it in the web page.
Use a Content Security Policy (CSP) to restrict the sources from which the browser can load resources, mitigating the impact of XSS attacks.
Regularly scan the website for vulnerabilities using a web application security scanner.
Implement a Web Application Firewall (WAF) to filter malicious traffic.