CVE-2025-6845
📋 TL;DR
CVE-2025-6845 is a critical SQL injection vulnerability in Simple Forum 1.0 that allows remote attackers to execute arbitrary SQL commands via the User parameter in /register1.php. This affects all installations of Simple Forum 1.0 with the vulnerable file accessible. Attackers can potentially read, modify, or delete database content.
💻 Affected Systems
- Simple Forum
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, authentication bypass, privilege escalation, and potential remote code execution if database functions allow it.
Likely Case
Database information disclosure, user data theft, and potential authentication bypass allowing unauthorized access to forum functionality.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Proof of concept is publicly available on GitHub. SQL injection vulnerabilities are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://code-projects.org/
Restart Required: No
Instructions:
No official patch available. Consider migrating to supported forum software or implementing custom fixes.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd server-side validation to sanitize User parameter input before processing.
Modify /register1.php to implement parameterized queries or input sanitization
Access Restriction
allRestrict access to /register1.php using web server configuration or authentication.
# Apache: <Location /register1.php> Require all denied </Location>
# Nginx: location /register1.php { deny all; }
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block SQL injection patterns targeting /register1.php
- Monitor and alert on suspicious access attempts to /register1.php with SQL injection payloads
🔍 How to Verify
Check if Vulnerable:
Check if /register1.php exists and test with SQL injection payloads in User parameter. Review source code for lack of parameterized queries.Check Version:
Check software version in admin panel or review installation files for version indicators.Verify Fix Applied:
Test with SQL injection payloads after implementing fixes to ensure they are blocked. Review code changes for proper input validation.📡 Detection & Monitoring
Log Indicators:
- SQL error messages in web server logs
- Unusual database queries from web application
- Multiple failed registration attempts with SQL syntax
Network Indicators:
- HTTP POST requests to /register1.php containing SQL keywords (UNION, SELECT, INSERT, etc.)
- Abnormal database traffic patterns
SIEM Query:
source="web_server_logs" AND uri="/register1.php" AND (message="sql" OR message="syntax" OR message="union" OR message="select")