CVE-2025-3973
📋 TL;DR
This critical SQL injection vulnerability in PHPGurukul COVID19 Testing Management System 1.0 allows remote attackers to execute arbitrary SQL commands via the mobnumber parameter in /check_availability.php. Attackers can potentially access, modify, or delete database content. Organizations using this specific version of the COVID19 Testing Management System are affected.
💻 Affected Systems
- PHPGurukul COVID19 Testing Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via SQL injection to RCE chaining.
Likely Case
Unauthorized access to sensitive medical testing data, patient information, and administrative credentials stored in the database.
If Mitigated
Limited information disclosure or database performance degradation if proper input validation and WAF rules are in place.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires no authentication and has simple exploitation vectors.
🛠️ 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
allImplement strict input validation and parameterized queries for all user inputs in /check_availability.php
Edit /check_availability.php to use prepared statements with PDO or mysqli
Web Application Firewall Rules
allDeploy WAF rules to block SQL injection patterns targeting mobnumber parameter
Add WAF rule: Block requests containing SQL keywords in mobnumber parameter
🧯 If You Can't Patch
- Network segmentation: Isolate the vulnerable system from sensitive networks
- Disable /check_availability.php endpoint if not required
🔍 How to Verify
Check if Vulnerable:
Test /check_availability.php with SQL injection payloads in mobnumber parameterCheck Version:
Check system documentation or admin panel for version informationVerify Fix Applied:
Verify that SQL injection attempts no longer succeed and return proper error handling📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in web server logs
- Multiple failed requests to /check_availability.php with SQL keywords
Network Indicators:
- HTTP requests to /check_availability.php containing SQL injection patterns
SIEM Query:
source="web_logs" AND uri="/check_availability.php" AND (mobnumber CONTAINS "UNION" OR mobnumber CONTAINS "SELECT" OR mobnumber CONTAINS "OR 1=1")