CVE-2025-25616
📋 TL;DR
Unifiedtransform 2.0 has an access control vulnerability that allows students to modify exam rules through the /exams/edit-rule endpoint. This affects all deployments of Unifiedtransform 2.0 where student accounts exist. The vulnerability enables unauthorized privilege escalation within the application.
💻 Affected Systems
- Unifiedtransform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Students could modify exam rules to lower passing thresholds, change grading criteria, or manipulate exam schedules, potentially compromising academic integrity across the entire institution.
Likely Case
Students modify exam rules for their own classes to gain unfair advantages, such as extending exam durations or altering scoring parameters.
If Mitigated
With proper access controls, only authorized administrators can modify exam rules, maintaining academic integrity and system security.
🎯 Exploit Status
Exploitation requires student-level credentials. The GitHub repository shows proof-of-concept exploitation methods.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor the GitHub repository for updates or consider upgrading to a newer version if available.
🔧 Temporary Workarounds
Access Control Hardening
allImplement additional authorization checks at the application level to verify user roles before allowing exam rule modifications.
Modify /exams/edit-rule endpoint to include role verification: if user.role != 'admin' then deny access
Endpoint Restriction
allRestrict access to the vulnerable endpoint using web server configuration or middleware.
Add rule to .htaccess: Deny from all
Configure nginx: location /exams/edit-rule { deny all; }
🧯 If You Can't Patch
- Implement network segmentation to isolate the Unifiedtransform application from student networks
- Enable detailed logging of all exam rule modification attempts and monitor for unauthorized access patterns
🔍 How to Verify
Check if Vulnerable:
Attempt to access /exams/edit-rule?exam_rule_id=1 with student credentials. If access is granted and rule modification is possible, the system is vulnerable.Check Version:
Check the application version in the admin panel or configuration files. Look for version 2.0 in the codebase.Verify Fix Applied:
Test with student credentials to ensure access to /exams/edit-rule endpoint is properly denied with appropriate authorization errors.📡 Detection & Monitoring
Log Indicators:
- POST or GET requests to /exams/edit-rule from non-admin user accounts
- Exam rule modification logs showing student user IDs
Network Indicators:
- HTTP requests to /exams/edit-rule endpoint with student authentication tokens
SIEM Query:
source="web_logs" AND (url="/exams/edit-rule" OR url CONTAINS "/exams/edit-rule?") AND user_role!="admin"