CVE-2025-6911
📋 TL;DR
This critical SQL injection vulnerability in PHPGurukul Student Record System 3.2 allows attackers to execute arbitrary SQL commands via the 'del' parameter in /manage-subjects.php. Remote attackers can potentially access, modify, or delete database content. All users running the vulnerable version are affected.
💻 Affected Systems
- PHPGurukul Student Record System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data destruction, authentication bypass, and potential server takeover via SQL injection to RCE chaining.
Likely Case
Unauthorized access to student records, grade manipulation, personal data exfiltration, and database corruption.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only error messages or limited data exposure.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Attack requires access to the vulnerable endpoint but may not require authentication depending on system configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://phpgurukul.com/
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. If no patch available, implement workarounds. 3. Consider migrating to alternative software if vendor is unresponsive.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd parameterized queries or prepared statements for the 'del' parameter in manage-subjects.php
Edit manage-subjects.php to replace raw SQL with prepared statements using PDO or mysqli
Web Application Firewall (WAF)
allDeploy WAF rules to block SQL injection patterns targeting the vulnerable endpoint
Add WAF rule: Block requests containing SQL keywords in 'del' parameter to /manage-subjects.php
🧯 If You Can't Patch
- Restrict network access to the application using firewall rules
- Implement database user with minimal privileges (read-only if possible)
🔍 How to Verify
Check if Vulnerable:
Test the /manage-subjects.php endpoint with SQL injection payloads in the 'del' parameter and observe database errors or unexpected behavior.Check Version:
Check application version in admin panel or review source code for version markersVerify Fix Applied:
Attempt SQL injection after implementing fixes and confirm no database errors or unauthorized data access occurs.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in application logs
- Unusual database queries from web server IP
- Multiple failed parameter manipulation attempts
Network Indicators:
- HTTP POST requests to /manage-subjects.php with SQL keywords in parameters
- Unusual database port traffic from web server
SIEM Query:
source="web_logs" AND uri="/manage-subjects.php" AND (param="del" AND value MATCHES "(?i)(union|select|insert|delete|update|drop|--|#|;)")