CVE-2026-24674
📋 TL;DR
CVE-2026-24674 is a reflected cross-site scripting vulnerability in Open eClass (formerly GUnet eClass) that allows attackers to execute arbitrary JavaScript in authenticated users' browsers by tricking them into clicking malicious URLs. This affects all Open eClass installations prior to version 4.2. The vulnerability enables session hijacking, data theft, and unauthorized actions within the course management system.
💻 Affected Systems
- Open eClass (formerly GUnet eClass)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, compromise student data, modify course content, or perform unauthorized administrative actions across the entire platform.
Likely Case
Attackers would typically steal session cookies to hijack user accounts, potentially accessing sensitive course materials or personal information.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute malicious scripts, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Exploitation requires crafting malicious URLs and social engineering to get victims to click them. The vulnerability is in the web interface accessible to authenticated users.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.2
Vendor Advisory: https://github.com/gunet/openeclass/security/advisories/GHSA-gqvp-w22w-w99r
Restart Required: Yes
Instructions:
1. Backup your current installation and database. 2. Download Open eClass version 4.2 from the official repository. 3. Follow the upgrade instructions in the documentation. 4. Restart your web server. 5. Verify the installation is working correctly.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block XSS payloads in URL parameters
# Example ModSecurity rule: SecRule ARGS "<script" "id:1001,phase:2,deny,status:403,msg:'XSS Attack Detected'"
# Example nginx rule: location ~* "<script" { return 403; }
Content Security Policy (CSP)
allImplement strict CSP headers to prevent script execution from untrusted sources
# Add to web server config: add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval';" always;
🧯 If You Can't Patch
- Implement strict input validation on all URL parameters
- Deploy a web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check if your Open eClass version is below 4.2 by examining the version file or admin interfaceCheck Version:
grep -r 'VERSION' /path/to/openeclass/installation/ | grep -i versionVerify Fix Applied:
After upgrading to version 4.2, test URL parameters with basic XSS payloads like <script>alert('test')</script> to ensure they're properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code
- Multiple failed login attempts followed by suspicious URL access
Network Indicators:
- HTTP requests with suspicious parameters containing <script>, javascript:, or other XSS payloads
SIEM Query:
source="web_server_logs" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=") AND uri_path="/openeclass/*"