CVE-2025-4218
📋 TL;DR
A critical code injection vulnerability exists in handrew browserpilot's GPTSeleniumAgent function where malicious instructions can execute arbitrary code. This affects users of browserpilot versions up to 0.2.51 who process untrusted input through the vulnerable function. Attackers need local access to exploit this vulnerability.
💻 Affected Systems
- handrew browserpilot
📦 What is this software?
Browserpilot by Andrewhhan
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with arbitrary code execution at the privilege level of the browserpilot process, potentially leading to data theft, lateral movement, or persistence establishment.
Likely Case
Local privilege escalation or execution of malicious commands within the browser automation context, potentially compromising sensitive data processed by browserpilot.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only affecting the specific browserpilot session.
🎯 Exploit Status
Exploit details have been publicly disclosed in GitHub issues. Attack requires local access to the system running browserpilot.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.2.52 or later
Vendor Advisory: https://github.com/handrew/browserpilot/issues/20
Restart Required: Yes
Instructions:
1. Check current version with 'pip show browserpilot'. 2. Upgrade using 'pip install --upgrade browserpilot'. 3. Restart any running browserpilot processes.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for the instructions parameter in GPTSeleniumAgent
# Add input validation in gpt_selenium_agent.py
# Validate instructions parameter before processing
Sandbox Execution
linuxRun browserpilot in a restricted environment or container
docker run --read-only -v /tmp:/tmp:ro your/browserpilot-image
🧯 If You Can't Patch
- Restrict local access to systems running browserpilot to trusted users only
- Implement network segmentation and monitor for unusual process execution from browserpilot
🔍 How to Verify
Check if Vulnerable:
Check if browserpilot version is 0.2.51 or earlier using 'pip show browserpilot | grep Version'Check Version:
pip show browserpilot | grep VersionVerify Fix Applied:
Confirm version is 0.2.52 or later with 'pip show browserpilot | grep Version' and test with known safe input📡 Detection & Monitoring
Log Indicators:
- Unusual command execution from browserpilot processes
- Error messages related to GPTSeleniumAgent parameter validation
Network Indicators:
- Unusual outbound connections from browserpilot processes
SIEM Query:
process.name:"python" AND process.args:"browserpilot" AND process.args:"gpt_selenium_agent"