CVE-2026-1202
📋 TL;DR
This vulnerability allows remote attackers to bypass authentication in CRMEB systems by manipulating the openId parameter in the appleLogin function. Attackers can gain unauthorized access without valid credentials. All CRMEB installations up to version 5.6.3 are affected.
💻 Affected Systems
- CRMEB
📦 What is this software?
Crmeb by Crmeb
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative access, steal sensitive customer data, modify system configurations, and potentially deploy ransomware or other malware.
Likely Case
Unauthorized access to user accounts, data theft, privilege escalation, and potential lateral movement within the system.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place to detect and block exploitation attempts.
🎯 Exploit Status
Public exploit code is available, making this easily weaponizable by attackers with minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - vendor did not respond to disclosure
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version beyond 5.6.3 if available, or implement workarounds.
🔧 Temporary Workarounds
Disable Apple Login Function
linuxTemporarily disable the vulnerable appleLogin function to prevent exploitation
# Rename or remove the vulnerable file
mv crmeb/app/api/controller/v1/LoginController.php crmeb/app/api/controller/v1/LoginController.php.disabled
Implement Input Validation
allAdd server-side validation for the openId parameter to prevent manipulation
# Add validation in LoginController.php before processing openId
# Example: if(!is_valid_openid($_POST['openId'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block requests manipulating the openId parameter
- Enable detailed logging and monitoring for authentication attempts and implement alerting for suspicious patterns
🔍 How to Verify
Check if Vulnerable:
Check if your CRMEB version is 5.6.3 or earlier and if the appleLogin function exists in LoginController.phpCheck Version:
grep -r 'version' crmeb/config/version.php || check CRMEB admin panelVerify Fix Applied:
Test authentication bypass attempts with manipulated openId parameters - they should fail after remediation📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login with unusual openId values
- Requests to appleLogin endpoint with manipulated parameters
Network Indicators:
- Unusual authentication traffic patterns
- Requests bypassing normal authentication flow
SIEM Query:
source="web_logs" AND (uri="/api/v1/login/apple" OR uri LIKE "%appleLogin%") AND (status=200 OR status=302) AND (user_agent NOT LIKE "%Apple%" OR param_openId CONTAINS suspicious_pattern)