CVE-2025-53967
📋 TL;DR
CVE-2025-53967 is a critical remote code execution vulnerability in Framelink Figma MCP Server versions before 0.6.3. Unauthenticated attackers can execute arbitrary operating system commands via crafted HTTP POST requests containing shell metacharacters. This affects any system running vulnerable versions of the Figma MCP Server with network access to its interface.
💻 Affected Systems
- Framelink Figma MCP Server
⚠️ 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
Complete system compromise allowing attacker to execute arbitrary commands with MCP process privileges, potentially leading to data theft, lateral movement, or ransomware deployment.
Likely Case
Attacker gains shell access on the host running the MCP server, enabling data exfiltration, installation of backdoors, or use as a pivot point for further attacks.
If Mitigated
With proper network segmentation and access controls, impact limited to the isolated MCP server environment.
🎯 Exploit Status
Exploitation is straightforward with publicly available technical details showing the command injection pattern.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.6.3
Vendor Advisory: https://github.com/GLips/Figma-Context-MCP/releases/tag/v0.6.3
Restart Required: Yes
Instructions:
1. Stop the Figma MCP Server. 2. Update to version 0.6.3 or later using npm: 'npm update @framelink/figma-mcp-server'. 3. Restart the server.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to the MCP server interface using firewall rules
iptables -A INPUT -p tcp --dport [MCP_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [MCP_PORT] -j DROP
Reverse Proxy with Input Validation
allPlace a reverse proxy that sanitizes POST request parameters before forwarding to the MCP server
🧯 If You Can't Patch
- Isolate the MCP server in a dedicated network segment with strict access controls
- Implement application-level firewall rules to block requests containing shell metacharacters
🔍 How to Verify
Check if Vulnerable:
Check the package.json file or run 'npm list @framelink/figma-mcp-server' to see if version is below 0.6.3Check Version:
npm list @framelink/figma-mcp-server | grep @framelink/figma-mcp-serverVerify Fix Applied:
Confirm version is 0.6.3 or higher using 'npm list @framelink/figma-mcp-server'📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to MCP endpoints
- Error logs showing shell command failures
- Process spawn events from the MCP server
Network Indicators:
- HTTP POST requests containing shell metacharacters (;, |, &, $, `)
- Unusual outbound connections from MCP server
SIEM Query:
source="mcp-server.log" AND (POST AND ("curl" OR "bash" OR "sh" OR metacharacters))