CVE-2012-6644 in ClipBucket
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in ClipBucket 2.6 allow remote attackers to inject arbitrary web script or HTML via the (1) cat parameter to channels.php, (2) collections.php, (3) groups.php, or (4) videos.php; (5) query parameter to search_result.php; or (6) type parameter to view_collection.php or (7) view_item.php.
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Analysis
by VulDB Data Team • 05/10/2026
The CVE-2012-6644 vulnerability represents a critical cross-site scripting flaw discovered in ClipBucket version 2.6, a popular open-source video sharing platform. This vulnerability stems from insufficient input validation and sanitization within multiple PHP script files that handle user-supplied parameters. The flaw affects several core functionality modules including channel management, video search, collection viewing, and group operations, making it particularly dangerous as it can be exploited across multiple attack vectors within the application's ecosystem.
The technical implementation of this vulnerability occurs when the application fails to properly sanitize user input before incorporating it into dynamic web page content. Specifically, the cat parameter in channels.php, the collections.php, groups.php, and videos.php scripts all accept unfiltered user data that gets directly embedded into HTML output without proper encoding or validation. Similarly, the query parameter in search_result.php and the type parameter in view_collection.php and view_item.php present identical vulnerabilities where attacker-controlled input flows directly into the application's response generation process. These flaws fall under CWE-79 which specifically addresses cross-site scripting vulnerabilities due to improper input handling and output encoding.
The operational impact of this vulnerability is severe as it enables remote attackers to execute malicious scripts within the context of any user's browser who visits affected pages. An attacker could inject malicious JavaScript code through any of the vulnerable parameters, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The widespread nature of the vulnerability across multiple PHP files means that exploitation opportunities are abundant, and the impact extends to all users of the ClipBucket platform who interact with these vulnerable endpoints. This vulnerability particularly affects the platform's user trust model as legitimate users may unknowingly execute malicious code when browsing content or performing searches.
Security mitigations for CVE-2012-6644 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. All user-supplied parameters must be sanitized using proper HTML entity encoding before being rendered in web pages, with the application employing a whitelist-based approach for acceptable input values. The fix should include implementing proper parameter validation in each vulnerable script file, specifically ensuring that cat, query, and type parameters are validated against expected formats and sanitized before any output generation. Additionally, the application should implement Content Security Policy headers to provide additional defense-in-depth against script injection attacks. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection techniques and T1566 for social engineering attacks that could leverage these XSS flaws to compromise user sessions and data integrity. Organizations should also consider implementing web application firewalls and regular security code reviews to prevent similar vulnerabilities from emerging in future versions of the software.