CVE-2025-23083
📋 TL;DR
This vulnerability in Node.js allows attackers to hook into worker thread creation events via the diagnostics_channel utility, enabling them to access internal workers and misuse their constructors for malicious purposes. It specifically affects users of the Permission Model (--permission flag) in Node.js versions 20, 22, and 23. The exploit could lead to privilege escalation or unauthorized code execution within the Node.js environment.
💻 Affected Systems
- Node.js
⚠️ 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
Full privilege escalation within the Node.js process, allowing attackers to bypass permission model restrictions and execute arbitrary code with the same privileges as the Node.js process.
Likely Case
Partial privilege escalation enabling unauthorized access to internal Node.js APIs and potentially sensitive data within the application context.
If Mitigated
Limited impact due to proper permission model configuration and network segmentation, potentially only allowing information disclosure about internal worker structures.
🎯 Exploit Status
Exploitation requires understanding of Node.js internal worker architecture and the ability to inject code into the diagnostics_channel event hooks. No public exploit code has been released as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Node.js v20.17.0, v22.11.0, v23.5.0
Vendor Advisory: https://nodejs.org/en/blog/vulnerability/january-2025-security-releases
Restart Required: Yes
Instructions:
1. Check current Node.js version: node --version
2. Update to patched version using your package manager:
- npm: npm install -g node@20.17.0 (or appropriate version)
- nvm: nvm install 20.17.0 && nvm use 20.17.0
- System package manager: Use apt, yum, brew, etc.
3. Restart all Node.js applications and services.
🔧 Temporary Workarounds
Disable Permission Model
allRemove the --permission flag from Node.js startup arguments if not required for your application.
Remove '--permission' flag from application startup scripts and configuration
Restrict diagnostics_channel Access
allImplement code reviews and access controls to prevent unauthorized use of diagnostics_channel APIs in your application code.
🧯 If You Can't Patch
- Disable the Permission Model (--permission flag) if not absolutely required for application functionality.
- Implement strict network segmentation and access controls to limit exposure of vulnerable Node.js applications.
🔍 How to Verify
Check if Vulnerable:
Check if Node.js version is between v20.0.0-20.16.x, v22.0.0-22.10.x, or v23.0.0-23.4.x AND the application uses the --permission flag.Check Version:
node --versionVerify Fix Applied:
Verify Node.js version is v20.17.0+, v22.11.0+, or v23.5.0+ using: node --version📡 Detection & Monitoring
Log Indicators:
- Unusual diagnostics_channel usage patterns
- Unexpected worker thread creation events
- Permission model violation attempts
Network Indicators:
- Unusual outbound connections from Node.js processes
- Unexpected process spawning from Node.js applications
SIEM Query:
process.name:"node" AND (process.args:"--permission" OR event.action:"worker_thread_creation")