CVE-2012-4998 in starCMS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in starCMS allows remote attackers to inject arbitrary web script or HTML via the q parameter.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 04/25/2025
The CVE-2012-4998 vulnerability represents a classic cross-site scripting flaw within the starCMS content management system that exposes web applications to persistent security risks. This vulnerability specifically targets the index.php file where user input is not properly sanitized before being rendered back to users, creating an avenue for malicious actors to execute arbitrary scripts within the context of victim sessions.
The technical exploitation occurs through the q parameter which serves as an injection point for malicious payloads. When attackers craft specially formatted input strings and submit them through this parameter, the starCMS application fails to validate or escape the content before displaying it in web responses. This lack of input sanitization allows attackers to inject HTML tags and JavaScript code that executes in the browsers of unsuspecting users who view the affected pages.
From an operational perspective, this vulnerability enables attackers to perform various malicious activities including session hijacking, credential theft, and redirection to malicious websites. The impact extends beyond simple script execution as it can lead to complete compromise of user sessions and potential lateral movement within affected networks. Users who browse pages containing the injected content may unknowingly execute malicious code that can capture their credentials or redirect them to phishing sites.
The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1566.001 for initial access through spearphishing attachments or links. Security practitioners should note that this vulnerability demonstrates the critical importance of input validation and output encoding in web application security. The flaw represents a fundamental weakness in the application's defense-in-depth strategy, where proper sanitization should occur at multiple layers of the application stack.
Mitigation strategies should include immediate patching of the starCMS application to address the input validation weakness in the index.php file. Additionally, implementing proper input sanitization routines that filter or escape special characters in all user-supplied parameters will prevent similar vulnerabilities. Organizations should deploy web application firewalls to monitor for suspicious patterns in q parameter usage and establish comprehensive logging of user input for security monitoring purposes. Regular security assessments and code reviews focusing on input validation practices will help prevent similar issues from emerging in other parts of the application infrastructure.