CVE-2025-65797
📋 TL;DR
This vulnerability allows attackers with low-level privileges in usememos memos v0.25.2 to modify or delete identity providers, potentially leading to account takeover or denial of service. Any organization using the affected version of usememos memos with multiple user privilege levels is at risk.
💻 Affected Systems
- usememos memos
📦 What is this software?
Memos by Usememos
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover of all users, service disruption through deletion of identity providers, and potential data loss.
Likely Case
Unauthorized modification of identity provider configurations leading to authentication failures or account compromise for some users.
If Mitigated
Limited impact with proper privilege separation and monitoring, potentially only affecting non-critical identity providers.
🎯 Exploit Status
Requires low-level authenticated access but the exploit itself is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.25.3 or later
Vendor Advisory: https://github.com/usememos/memos/pull/5217
Restart Required: Yes
Instructions:
1. Backup your current memos installation and data. 2. Update to v0.25.3 or later using your package manager or by downloading from GitHub. 3. Restart the memos service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Identity Provider Access
allTemporarily restrict access to identity provider management functions to administrators only.
# Configure access controls in your reverse proxy or application firewall
# Example nginx location block: location /api/idp/ { deny all; }
Implement Network Segmentation
linuxIsolate the memos service from untrusted networks and limit internal access.
# Use firewall rules to restrict access
# Example iptables: iptables -A INPUT -p tcp --dport [memos-port] -s [trusted-network] -j ACCEPT
🧯 If You Can't Patch
- Implement strict role-based access control to limit who can modify identity providers.
- Enable detailed logging and monitoring for identity provider modification attempts.
🔍 How to Verify
Check if Vulnerable:
Check if running usememos memos version 0.25.2. Review user privilege assignments and identity provider access logs.Check Version:
Check the memos web interface admin panel or run: docker exec [container-name] memos versionVerify Fix Applied:
Verify version is 0.25.3 or later. Test that low-privilege users cannot modify or delete identity providers.📡 Detection & Monitoring
Log Indicators:
- Unauthorized PUT/DELETE requests to /api/idp/* endpoints
- Identity provider configuration changes from non-admin users
- Failed authentication attempts following identity provider modifications
Network Indicators:
- Unusual patterns of API calls to identity provider endpoints
- Multiple identity provider modification requests from single source
SIEM Query:
source="memos" AND (uri_path="/api/idp/*" AND (http_method="PUT" OR http_method="DELETE") AND user_role!="admin")