CVE-2021-3294 in Automated Enrollment System
Summary
by MITRE • 02/09/2021
CASAP Automated Enrollment System 1.0 is affected by cross-site scripting (XSS) in users.php. An attacker can steal a cookie to perform user redirection to a malicious website.
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Analysis
by VulDB Data Team • 05/04/2025
The CASAP Automated Enrollment System version 1.0 contains a critical cross-site scripting vulnerability in the users.php component that represents a significant security risk for organizations relying on this enrollment platform. This vulnerability stems from inadequate input validation and output sanitization mechanisms within the web application's user management interface. The flaw allows malicious actors to inject malicious scripts into the application's response, which then executes in the context of other users' browsers when they access the affected page.
The technical implementation of this XSS vulnerability occurs when user-supplied input is directly incorporated into the web page's HTML response without proper sanitization or encoding. Attackers can exploit this weakness by crafting malicious payloads that leverage the system's failure to validate or escape user-provided data. When a victim browser renders the compromised page, the injected scripts execute automatically, potentially stealing session cookies, redirecting users to malicious sites, or performing unauthorized actions on behalf of authenticated users. This vulnerability specifically targets the users.php endpoint, indicating that any functionality involving user data display or manipulation within this component could be exploited.
The operational impact of this vulnerability extends beyond simple data theft, as it creates a persistent threat vector for attackers seeking to establish long-term access to the enrollment system. Successful exploitation could enable attackers to hijack user sessions, gain unauthorized access to sensitive enrollment data, and potentially escalate privileges within the system. The cookie theft capability particularly undermines the authentication security model, as session tokens that should remain secure can be extracted and reused by malicious actors. This vulnerability also facilitates social engineering attacks where users are redirected to phishing sites that appear legitimate, further compromising the security posture of the entire enrollment ecosystem.
Organizations should implement comprehensive mitigation strategies including immediate input validation and output encoding across all user-facing components of the CASAP system. The implementation of Content Security Policy headers can provide additional protection against script execution, while proper sanitization of user inputs should be enforced at multiple layers of the application architecture. Regular security testing and code reviews should be conducted to identify similar vulnerabilities in other components of the enrollment system. According to CWE standards, this vulnerability maps to CWE-79 which specifically addresses cross-site scripting flaws, while the ATT&CK framework categorizes this as a technique for code injection and credential access through web application vulnerabilities. Organizations should also consider implementing web application firewalls and monitoring for suspicious script injection patterns to detect potential exploitation attempts.