CVE-2007-3235 in Fuzzylime Forum
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in low.php in Fuzzylime Forum 1.0 allows remote attackers to inject arbitrary web script or HTML via the topic parameter. NOTE: this might be resultant from SQL injection.
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Analysis
by VulDB Data Team • 09/21/2024
The vulnerability identified as CVE-2007-3235 represents a critical cross-site scripting flaw within the Fuzzylime Forum 1.0 software, specifically affecting the low.php script. This issue enables remote attackers to execute malicious web scripts or HTML content through manipulation of the topic parameter, creating a significant security risk for users interacting with the forum platform. The vulnerability's classification as a potential SQL injection resultant issue suggests a deeper underlying flaw in input validation and data handling mechanisms that may compound the security implications beyond simple XSS exploitation.
The technical implementation of this vulnerability stems from inadequate sanitization of user input within the forum's topic parameter handling. When users submit topics or navigate through forum threads, the low.php script fails to properly validate or escape special characters in the topic parameter before rendering it within the web page context. This allows attackers to inject malicious payloads that execute in the browsers of other users who view the affected content, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability operates under CWE-79 which specifically addresses Cross-Site Scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through malicious web content.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to establish persistent access to user sessions and potentially escalate privileges within the forum environment. Users who view infected topics become unwitting participants in the attack chain, making this vector particularly dangerous for community-driven platforms where user-generated content is prevalent. The combination with potential SQL injection capabilities suggests that attackers might first exploit the XSS to gain information disclosure or database access, then leverage that access to manipulate the forum's backend systems. This multi-layered attack potential makes the vulnerability particularly concerning for any organization relying on forum software for user interaction and content management.
Mitigation strategies for this vulnerability should prioritize immediate input validation and output escaping mechanisms within the forum's PHP scripts. The recommended approach involves implementing strict sanitization of all user input parameters, particularly those used in dynamic content generation, and ensuring that all output is properly escaped for the intended context. Organizations should implement Content Security Policy headers to limit script execution capabilities, deploy web application firewalls to detect and block malicious payloads, and conduct regular security audits of all user input handling mechanisms. Additionally, upgrading to a patched version of Fuzzylime Forum 1.0 or migrating to a more secure forum platform represents the most effective long-term solution to prevent exploitation of this and similar vulnerabilities. The vulnerability demonstrates the critical importance of defense-in-depth strategies and proper input validation practices that align with industry standards such as OWASP Top Ten and NIST cybersecurity frameworks.