CVE-2010-4772 in S-CMS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in blocks/lang.php in S-CMS 2.5 allows remote attackers to inject arbitrary web script or HTML via the id parameter to viewforum.php.
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Analysis
by VulDB Data Team • 11/27/2025
The CVE-2010-4772 vulnerability represents a critical cross-site scripting flaw within the S-CMS 2.5 content management system that exposes web applications to malicious code injection attacks. This vulnerability specifically targets the blocks/lang.php component and manifests through the id parameter in the viewforum.php file, creating a pathway for remote attackers to execute arbitrary web scripts or HTML code within the context of users' browsers. The flaw demonstrates a classic lack of proper input validation and output sanitization that has been documented as a primary vector for XSS attacks in web applications for decades.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input parameters within the S-CMS framework. When the id parameter from viewforum.php is passed to blocks/lang.php without adequate sanitization, the system fails to properly escape or encode special characters that could be interpreted as executable script code. This weakness allows attackers to craft malicious payloads that, when executed by victim browsers, can perform unauthorized actions such as stealing session cookies, redirecting users to malicious sites, or defacing web pages. The vulnerability aligns with CWE-79 which categorizes cross-site scripting as a fundamental web application security flaw involving improper validation of input data.
From an operational perspective, this vulnerability presents significant risks to organizations using S-CMS 2.5 as it enables attackers to compromise user sessions and potentially gain unauthorized access to sensitive information. The remote nature of the attack means that threat actors can exploit this flaw without requiring physical access to the target system, making it particularly dangerous in environments where user interaction is common. The impact extends beyond simple script execution as attackers can leverage this vulnerability to perform session hijacking, deface websites, or redirect users to phishing sites that can harvest credentials and personal information. This vulnerability directly maps to tactics described in the MITRE ATT&CK framework under the T1059 category for command and scripting interpreters, as well as T1531 for credential access through web application attacks.
Security mitigations for this vulnerability should include immediate input validation and output encoding mechanisms that sanitize all user-supplied parameters before processing. Organizations should implement proper parameter validation that rejects or encodes potentially dangerous characters such as angle brackets, quotes, and script tags. The fix involves modifying the blocks/lang.php file to properly escape or filter the id parameter from viewforum.php before it is processed or displayed. Additionally, implementing Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be loaded. Regular security audits and input validation testing should be conducted to prevent similar vulnerabilities from emerging in other components of the application. Organizations should also consider implementing web application firewalls to detect and block suspicious traffic patterns associated with XSS attack attempts. The remediation process should follow established security practices including proper code review procedures, automated vulnerability scanning, and comprehensive testing of input validation mechanisms to ensure that all user-supplied data is properly sanitized before being processed or rendered within the application context.