CVE-2025-22952
📋 TL;DR
CVE-2025-22952 is a Server-Side Request Forgery (SSRF) vulnerability in elestio memos v0.23.0 that allows attackers to make unauthorized requests from the server to internal or external systems. This affects all deployments running the vulnerable version, potentially exposing internal network resources or enabling data exfiltration.
💻 Affected Systems
- elestio memos
📦 What is this software?
Memos by Usememos
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data, or pivot to other systems within the network, potentially leading to full network compromise.
Likely Case
Unauthorized access to internal HTTP services, metadata services (like AWS/Azure instance metadata), or local file inclusion via file:// protocol.
If Mitigated
Limited to accessing only allowed external resources if proper URL validation and network segmentation are implemented.
🎯 Exploit Status
Exploitation requires authenticated access to the memos application. The vulnerability is in URL validation logic when processing user-supplied URLs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.23.1 or later
Vendor Advisory: https://github.com/usememos/memos/issues/4413
Restart Required: Yes
Instructions:
1. Backup your memos data. 2. Stop the memos service. 3. Update to v0.23.1 or later using your deployment method (Docker, binary, etc.). 4. Restart the service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Network Segmentation
allRestrict outbound network access from the memos server to only necessary external services
Use firewall rules to block outbound HTTP/HTTPS from memos server except to required external APIs
Input Validation
allImplement additional URL validation at the application layer or WAF
Configure WAF rules to block SSRF patterns and internal IP ranges
🧯 If You Can't Patch
- Implement strict network egress filtering to prevent access to internal IP ranges and metadata services
- Deploy a WAF with SSRF protection rules in front of the application
🔍 How to Verify
Check if Vulnerable:
Check if running memos v0.23.0 by accessing the web interface or checking the container/binary versionCheck Version:
docker exec memos-container cat /app/version.txt || check web interface footerVerify Fix Applied:
Confirm version is v0.23.1 or later and test URL validation functionality📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from memos server
- Requests to internal IP addresses or metadata services
Network Indicators:
- HTTP traffic from memos server to unexpected internal/external destinations
SIEM Query:
source="memos" AND (dest_ip IN (RFC1918_RANGES) OR dest_host LIKE "metadata.*")