CVE-2026-3786
📋 TL;DR
This SQL injection vulnerability in EasyCMS allows attackers to manipulate database queries through the _order parameter in RbacuserAction.class.php. Attackers can potentially read, modify, or delete database content remotely. All EasyCMS installations up to version 1.6 are affected.
💻 Affected Systems
- EasyCMS
📦 What is this software?
Easycms by Easycms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via subsequent attacks.
Likely Case
Unauthorized data access, privilege escalation, or data manipulation in the CMS database.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data.
🎯 Exploit Status
Public exploit available, remote exploitation possible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the _order parameter before processing.
Modify /RbacuserAction.class.php to validate _order parameter using prepared statements or whitelist validation
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns in the _order parameter.
Add WAF rule: Detect SQL keywords in _order parameter values
🧯 If You Can't Patch
- Isolate the EasyCMS instance behind a reverse proxy with strict input validation
- Implement network segmentation to limit database access from the CMS application
🔍 How to Verify
Check if Vulnerable:
Check if EasyCMS version is 1.6 or earlier and if /RbacuserAction.class.php exists with vulnerable parameter handling.Check Version:
Check CMS configuration files or admin panel for version informationVerify Fix Applied:
Test the _order parameter with SQL injection payloads to confirm they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts following SQL error patterns
- Requests with SQL keywords in _order parameter
Network Indicators:
- HTTP requests containing SQL injection patterns in URL parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (url="*_order=*SELECT*" OR url="*_order=*UNION*" OR url="*_order=*OR*1=1*")