CVE-2025-62401
📋 TL;DR
A vulnerability in Moodle's timed assignment feature allows students to bypass time restrictions, potentially gaining extra time to complete assessments. This affects Moodle instances with timed assignments enabled, impacting educational institutions and organizations using this learning management system.
💻 Affected Systems
- Moodle
📦 What is this software?
Moodle by Moodle
Moodle by Moodle
Moodle by Moodle
Moodle by Moodle
⚠️ Risk & Real-World Impact
Worst Case
Students could gain unlimited time for timed assessments, compromising academic integrity and potentially affecting grading fairness across entire courses.
Likely Case
Some students discover and exploit the bypass to gain modest time extensions, creating unfair advantages in timed exams or assignments.
If Mitigated
With proper monitoring and access controls, impact is limited to isolated incidents that can be detected and addressed.
🎯 Exploit Status
Requires student-level access to Moodle and knowledge of the bypass method
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Moodle security releases for CVE-2025-62401
Vendor Advisory: https://moodle.org/security/
Restart Required: No
Instructions:
1. Check current Moodle version. 2. Apply Moodle security update addressing CVE-2025-62401. 3. Verify timed assignment functionality works correctly post-update.
🔧 Temporary Workarounds
Disable timed assignments temporarily
allTemporarily disable the timed assignment feature until patched
Navigate to Moodle admin panel > Assignment settings > Disable timed restrictions
Enhanced monitoring of assignment submissions
allMonitor assignment submission times for anomalies
Review Moodle logs for assignment submission timing patterns
🧯 If You Can't Patch
- Implement manual time tracking for critical assessments
- Use alternative assessment methods without time restrictions
🔍 How to Verify
Check if Vulnerable:
Test if students can submit assignments after the configured time limit has expiredCheck Version:
Check Moodle version in Site administration > NotificationsVerify Fix Applied:
Verify that timed assignments properly enforce time restrictions after update📡 Detection & Monitoring
Log Indicators:
- Assignment submissions significantly after time limit
- Multiple submission attempts after time expiration
Network Indicators:
- Unusual timing patterns in assessment submissions
SIEM Query:
Search for assignment submission events where submission_time > assignment_end_time + grace_period