CVE-2025-4108
📋 TL;DR
This critical vulnerability in PHPGurukul Student Record System allows remote attackers to execute arbitrary SQL commands via the 'sub1' parameter in /add-subject.php. Successful exploitation could lead to data theft, modification, or deletion. All users running version 3.20 are affected.
💻 Affected Systems
- PHPGurukul Student Record System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including sensitive student records, administrative credentials theft, and potential system takeover via SQL injection leading to remote code execution.
Likely Case
Unauthorized access to student data, grade manipulation, and extraction of database contents including personal information.
If Mitigated
Limited impact with proper input validation and WAF rules blocking SQL injection patterns.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making this easily weaponizable. No authentication required for exploitation.
🛠️ 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 patch available, download and apply. 3. Test functionality after patching. 4. Consider upgrading to newer version if available.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to sanitize 'sub1' parameter before processing
// PHP code to sanitize input
$sub1 = mysqli_real_escape_string($connection, $_POST['sub1']);
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns
# ModSecurity rule example
SecRule ARGS:sub1 "@detectSQLi" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Remove or restrict access to /add-subject.php file via web server configuration
- Implement network segmentation to isolate the Student Record System from sensitive networks
🔍 How to Verify
Check if Vulnerable:
Test /add-subject.php endpoint with SQL injection payloads in 'sub1' parameter and observe database errors or unexpected behavior.Check Version:
Check system documentation or admin panel for version information, typically displayed in footer or about page.Verify Fix Applied:
Attempt SQL injection on patched system and verify proper error handling without database exposure.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web server logs
- Unusual database queries from web application
- Multiple failed parameter validation attempts
Network Indicators:
- HTTP POST requests to /add-subject.php with SQL keywords in parameters
- Unusual database port traffic from web server
SIEM Query:
source="web_logs" AND uri="/add-subject.php" AND (param="sub1" AND value CONTAINS "UNION" OR value CONTAINS "SELECT" OR value CONTAINS "--")