CVE-2022-26313
📋 TL;DR
This vulnerability in Mendix Forgot Password Appstore module allows attackers to hijack arbitrary user accounts through the sign-up flow. All Mendix applications using affected versions of this module are vulnerable. The high CVSS score reflects the authentication bypass impact.
💻 Affected Systems
- Mendix Forgot Password Appstore module
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover of any user in the system, including administrators, leading to data theft, privilege escalation, and system compromise.
Likely Case
Attackers hijack user accounts to access sensitive data, perform unauthorized actions, or pivot to other systems.
If Mitigated
With proper authentication controls and monitoring, impact limited to isolated account compromises that can be quickly detected and remediated.
🎯 Exploit Status
Exploitation requires access to the sign-up flow but no authentication; details in Siemens advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.5.1 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/pdf/ssa-134279.pdf
Restart Required: Yes
Instructions:
1. Update Mendix Forgot Password Appstore module to version 3.5.1 or later. 2. Redeploy affected Mendix applications. 3. Test functionality after update.
🔧 Temporary Workarounds
Disable sign-up functionality
allTemporarily disable user registration/sign-up flows in affected applications to prevent exploitation.
Implement additional authentication checks
allAdd custom validation in sign-up flow to verify user identity before account creation.
🧯 If You Can't Patch
- Monitor authentication logs for unusual sign-up patterns or account hijacking attempts.
- Implement network segmentation to isolate affected applications from critical systems.
🔍 How to Verify
Check if Vulnerable:
Check Mendix application configuration for Forgot Password module version; if version is between 3.3.0 and 3.5.0, it is vulnerable.Check Version:
Check Mendix Modeler or deployment configuration for module version details.Verify Fix Applied:
Confirm module version is 3.5.1 or later and test sign-up flow for security improvements.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful sign-up from same IP
- Unusual account creation patterns
- User complaints about account hijacking
Network Indicators:
- HTTP requests to sign-up endpoints with suspicious parameters
- Traffic spikes to authentication services
SIEM Query:
source="mendix_logs" AND (event="signup" OR event="account_creation") AND result="success" | stats count by src_ip