CVE-2025-9699
📋 TL;DR
This SQL injection vulnerability in SourceCodester Online Polling System 1.0 allows attackers to manipulate database queries through the myusername parameter in /admin/checklogin.php. Attackers can potentially read, modify, or delete database content, and may gain administrative access. Organizations using this specific polling system version are affected.
💻 Affected Systems
- SourceCodester Online Polling System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, system takeover, and potential lateral movement to other systems.
Likely Case
Unauthorized data access, administrative privilege escalation, and potential defacement of polling content.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data.
🎯 Exploit Status
Exploit details are publicly available; requires access to the admin login page but not authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.sourcecodester.com/
Restart Required: No
Instructions:
No official patch available. Consider replacing with alternative software or implementing custom fixes.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd parameterized queries or input sanitization to /admin/checklogin.php to prevent SQL injection.
Modify PHP code to use prepared statements: $stmt = $conn->prepare('SELECT * FROM users WHERE username = ?'); $stmt->bind_param('s', $myusername);
Web Application Firewall (WAF)
allDeploy a WAF to block SQL injection patterns targeting the vulnerable endpoint.
🧯 If You Can't Patch
- Isolate the system on a segmented network with strict access controls.
- Implement network monitoring and intrusion detection specifically for SQL injection attempts.
🔍 How to Verify
Check if Vulnerable:
Test the /admin/checklogin.php endpoint with SQL injection payloads in the myusername parameter.Check Version:
Check the system's documentation or configuration files for version information.Verify Fix Applied:
Verify that SQL injection attempts no longer succeed and that input validation is properly implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs, multiple failed login attempts with SQL syntax in usernames.
Network Indicators:
- HTTP POST requests to /admin/checklogin.php containing SQL keywords like UNION, SELECT, or -- in parameters.
SIEM Query:
source="web_logs" AND uri="/admin/checklogin.php" AND (request_body LIKE "%UNION%" OR request_body LIKE "%SELECT%" OR request_body LIKE "%--%")