CVE-2024-11321 Overview
CVE-2024-11321 is a reflected Cross-Site Scripting (XSS) vulnerability in Hi e-learning Learning Management System (LMS). The flaw stems from improper neutralization of user-supplied input during web page generation, allowing attackers to inject arbitrary JavaScript into rendered pages. The issue affects all versions of the Hi e-learning LMS released before 06.12.2024. Successful exploitation requires user interaction, typically achieved by luring a victim to click a crafted URL. The vulnerability is tracked under CWE-79 and was disclosed through Turkey's national cybersecurity coordination center (USOM).
Critical Impact
Attackers can execute arbitrary JavaScript in a victim's browser session, enabling session hijacking, credential theft, and unauthorized actions within the LMS.
Affected Products
- Hi e-learning Learning Management System (LMS) — all versions before 06.12.2024
Discovery Timeline
- 2024-12-06 - CVE-2024-11321 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-11321
Vulnerability Analysis
The vulnerability is a reflected XSS flaw in the Hi e-learning LMS web interface. User-controlled input passed through HTTP request parameters is embedded directly into HTTP responses without proper output encoding or sanitization. When a victim visits a crafted URL, the injected script executes in the context of the LMS origin. This grants the attacker access to browser-side artifacts such as session cookies, authentication tokens, and DOM content. The scope remains unchanged, meaning the impact is limited to the vulnerable application origin rather than extending to other systems.
Root Cause
The root cause is failure to neutralize special characters in user input before reflecting it into HTML output. Web applications that concatenate request data into responses without contextual encoding are subject to CWE-79. Proper mitigation requires encoding output based on the injection context, whether HTML body, attribute, JavaScript, or URL.
Attack Vector
Exploitation requires an attacker to craft a malicious URL containing the payload and deliver it to an authenticated LMS user, typically through phishing or embedded links. When the victim clicks the link, the LMS reflects the payload into the response and the browser executes the injected script. The attacker can then steal session cookies, perform actions on behalf of the user, or redirect the victim to attacker-controlled infrastructure. No authentication is required to craft the payload, but user interaction is mandatory.
No public proof-of-concept exploit is available. See the USOM Security Notification TR-24-1878 for advisory details.
Detection Methods for CVE-2024-11321
Indicators of Compromise
- HTTP requests to LMS endpoints containing encoded or raw script tags such as <script>, onerror=, onload=, or javascript: in query parameters.
- Unusual outbound requests from user browsers to attacker-controlled domains following LMS page loads.
- Session cookies or authentication tokens appearing in web server access logs as reflected query strings.
Detection Strategies
- Deploy web application firewall (WAF) rules that inspect query and body parameters for XSS payload patterns targeting LMS URL paths.
- Review web server access logs for HTTP requests containing common XSS vectors reflected into response bodies.
- Monitor Content Security Policy (CSP) violation reports if CSP is deployed, as injected inline scripts will generate violations.
Monitoring Recommendations
- Correlate LMS authentication events with suspicious referer headers pointing to external phishing domains.
- Alert on repeated failed session validations following exposure to reflected payloads, which may indicate session hijacking attempts.
- Track user reports of unexpected redirects or pop-ups originating from the LMS interface.
How to Mitigate CVE-2024-11321
Immediate Actions Required
- Upgrade Hi e-learning LMS to the version released on or after 06.12.2024 that contains the vendor fix.
- Instruct LMS users to avoid clicking untrusted links referencing the LMS domain until patching is confirmed.
- Rotate active session tokens and force re-authentication after applying the update.
Patch Information
Hi e-learning addressed the vulnerability in the LMS release dated 06.12.2024. Administrators should consult the Siber Güvenlik Notification TR-24-1878 for vendor-specific upgrade guidance. No workaround substitutes for applying the vendor patch.
Workarounds
- Deploy a WAF with signatures blocking reflected XSS payloads on all HTTP parameters accepted by the LMS.
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
- Set the HttpOnly and Secure flags on session cookies to reduce the impact of successful script injection.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.