CVE-2025-65799
📋 TL;DR
CVE-2025-65799 is a path traversal vulnerability in usememos memos v0.25.2 that allows attackers to access files outside the intended directory through the Attachment service. This affects all deployments running the vulnerable version of usememos memos, potentially exposing sensitive system files.
💻 Affected Systems
- usememos memos
📦 What is this software?
Memos by Usememos
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read arbitrary files on the server, including configuration files, credentials, or sensitive application data, leading to complete system compromise.
Likely Case
Attackers access application configuration files or other sensitive data stored in predictable locations, potentially enabling further attacks.
If Mitigated
Limited to reading files accessible to the application's service account, with no write or execution capabilities.
🎯 Exploit Status
Exploitation requires access to the Attachment service endpoint, but no authentication bypass is needed beyond what the application normally requires.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.25.3 or later
Vendor Advisory: https://github.com/usememos/memos/pull/5218
Restart Required: Yes
Instructions:
1. Backup your memos data. 2. Stop the memos service. 3. Update to v0.25.3 or later using your deployment method (Docker, binary, etc.). 4. Restart the memos service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable Attachment Service
allTemporarily disable the Attachment service feature if not required
Modify configuration to disable file uploads/attachments
Implement Web Application Firewall Rules
allBlock path traversal patterns in requests to the Attachment service
Configure WAF to block requests containing '../', '..\\', or similar traversal patterns
🧯 If You Can't Patch
- Restrict file system permissions for the memos service account to minimal required directories
- Implement network segmentation to limit access to the memos service to trusted users only
🔍 How to Verify
Check if Vulnerable:
Check if running usememos memos v0.25.2 and using the Attachment service featureCheck Version:
docker exec memos-container memos version OR check the About page in the web interfaceVerify Fix Applied:
Verify version is v0.25.3 or later and test that path traversal attempts are properly blocked📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in attachment logs
- Requests containing '../' or similar traversal patterns
Network Indicators:
- HTTP requests to attachment endpoints with suspicious file paths
SIEM Query:
source="memos.logs" AND ("../" OR "..\\" OR "%2e%2e%2f")