CVE-2026-1898
📋 TL;DR
This vulnerability in WeKan's LDAP user synchronization component allows improper access controls, potentially enabling unauthorized access to user accounts or data. It affects WeKan versions up to 8.20 and can be exploited remotely by attackers.
💻 Affected Systems
- WeKan
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain unauthorized access to sensitive user data, modify user permissions, or compromise the entire WeKan instance through privilege escalation.
Likely Case
Unauthorized access to user accounts, data leakage, or manipulation of user permissions within the WeKan application.
If Mitigated
Limited impact with proper network segmentation and access controls, but still presents authentication bypass risk.
🎯 Exploit Status
The vulnerability allows remote exploitation without authentication, suggesting relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.21
Vendor Advisory: https://github.com/wekan/wekan/releases/tag/v8.21
Restart Required: Yes
Instructions:
1. Backup your WeKan instance and database. 2. Stop the WeKan service. 3. Update to WeKan version 8.21 or later. 4. Restart the WeKan service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable LDAP User Sync
allTemporarily disable LDAP user synchronization to mitigate the vulnerability
Modify WeKan configuration to disable LDAP sync or set LDAP_ENABLED=false
Network Isolation
allRestrict network access to WeKan instance
Configure firewall rules to limit access to trusted IPs only
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Disable LDAP user synchronization feature entirely
🔍 How to Verify
Check if Vulnerable:
Check WeKan version via admin interface or by examining the installation. Versions 8.20 and below are vulnerable.Check Version:
Check WeKan admin panel or run appropriate version check command for your deployment methodVerify Fix Applied:
Verify version is 8.21 or higher and confirm LDAP sync functionality works properly after update.📡 Detection & Monitoring
Log Indicators:
- Unusual LDAP sync activities
- Authentication attempts from unexpected sources
- Access pattern anomalies in user accounts
Network Indicators:
- Unexpected connections to LDAP sync endpoint
- Traffic spikes to WeKan LDAP components
SIEM Query:
source="wekan" AND (event="ldap_sync" OR event="authentication") AND status="success" FROM unexpected_ip