CVE-2009-3513 in Pg Etraining
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Pilot Group (PG) eTraining allow remote attackers to inject arbitrary web script or HTML via (1) the cat_id parameter to courses_login.php, the id parameter to (2) news_read.php or (3) lessons_login.php, or (4) the cur parameter in a start action to lessons_login.php.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/04/2025
The vulnerability identified as CVE-2009-3513 represents a critical cross-site scripting flaw within the Pilot Group eTraining platform, a widely deployed learning management system used by educational institutions and corporate training departments. This vulnerability resides in the web application's handling of user-supplied input parameters, specifically targeting four distinct entry points that process user data without adequate sanitization or validation mechanisms. The affected parameters include cat_id in courses_login.php, id in news_read.php, id in lessons_login.php, and cur parameter during start actions in lessons_login.php, all of which are susceptible to malicious input injection attacks that can compromise user sessions and data integrity.
The technical exploitation of this vulnerability occurs through the improper validation of user input parameters, which allows attackers to inject malicious JavaScript code or HTML content directly into the application's response. When these parameters are processed without appropriate encoding or sanitization, the injected scripts execute within the context of other users' browsers who access the affected pages. This flaw aligns with CWE-79, which specifically addresses Cross-Site Scripting vulnerabilities in web applications, and demonstrates the classic pattern of insufficient input validation where user-controllable data flows directly into the application's output without proper context-aware encoding. The vulnerability's impact is amplified by the fact that it affects multiple pages within the same application, creating a broader attack surface that can be leveraged to compromise various user interactions across the platform.
The operational consequences of this vulnerability extend beyond simple data theft or session hijacking, as successful exploitation can lead to complete compromise of user accounts and unauthorized access to sensitive training materials. Attackers can leverage these XSS flaws to steal session cookies, redirect users to malicious sites, or inject persistent malicious content that affects all users visiting the compromised pages. The vulnerability particularly impacts the eTraining platform's security posture by undermining user trust and potentially exposing confidential educational content or personal information. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1531, which involves using malicious code to compromise systems, and represents a common exploitation pathway that attackers use to establish persistent access to web applications.
Mitigation strategies for CVE-2009-3513 require immediate implementation of proper input validation and output encoding mechanisms across all affected application parameters. Organizations should implement context-aware encoding for all user-supplied input, particularly when rendering data within HTML contexts, and establish robust parameter validation routines that reject malformed or suspicious input patterns. The solution approach must include implementing CSP (Content Security Policy) headers to limit script execution and prevent unauthorized code injection, while also ensuring that all parameters are properly sanitized before being processed or displayed. Regular security testing including dynamic application security testing (DAST) and manual penetration testing should be conducted to identify similar vulnerabilities in other application components, with security patches applied promptly to address the identified weaknesses and prevent exploitation attempts that could compromise the integrity of the entire eTraining platform.