CVE-2025-11736
📋 TL;DR
CVE-2025-11736 is an SQL injection vulnerability in itsourcecode Online Examination System 1.0 that allows remote attackers to execute arbitrary SQL commands via the Username parameter in /index.php. This affects all deployments of version 1.0 of the software. Successful exploitation could lead to unauthorized data access, modification, or system compromise.
💻 Affected Systems
- itsourcecode Online Examination System
📦 What is this software?
Online Examination System by Angeljudesuarez
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data manipulation, authentication bypass, and potential remote code execution via database functions.
Likely Case
Unauthorized access to sensitive examination data, student records, and administrative credentials stored in the database.
If Mitigated
Limited impact with proper input validation and database permission restrictions, though SQL injection attempts would still be logged.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability affects the login page, requiring no authentication for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://itsourcecode.com/
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds and input validation.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement parameterized queries or prepared statements for the Username parameter in /index.php
Modify PHP code to use prepared statements: $stmt = $conn->prepare('SELECT * FROM users WHERE username = ?'); $stmt->bind_param('s', $username);
Web Application Firewall Rules
allDeploy WAF rules to block SQL injection patterns in the Username parameter
Add WAF rule: Detect and block SQL injection patterns in POST parameters to /index.php
🧯 If You Can't Patch
- Isolate the system behind a reverse proxy with strict input validation
- Implement network segmentation to limit database access from the web server
🔍 How to Verify
Check if Vulnerable:
Test the login page with SQL injection payloads in the Username field (e.g., ' OR '1'='1) and observe database errors or unexpected behavior.Check Version:
Check the software version in the admin panel or review the source code for version indicators.Verify Fix Applied:
After implementing fixes, test with the same SQL injection payloads and verify they are rejected or properly sanitized without database errors.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web server logs
- Multiple failed login attempts with SQL keywords in Username field
- Unusual database query patterns from web server IP
Network Indicators:
- HTTP POST requests to /index.php containing SQL injection patterns in Username parameter
- Unusual database port connections from web server
SIEM Query:
source="web_logs" AND uri="/index.php" AND (Username CONTAINS "' OR" OR Username CONTAINS "UNION" OR Username CONTAINS "SELECT *")