CVE-2025-66419
📋 TL;DR
CVE-2025-66419 is a sandbox escape vulnerability in MaxKB's tool module that allows attackers to escalate privileges under concurrent conditions. This affects MaxKB versions 2.3.1 and below, potentially enabling unauthorized access to sensitive enterprise AI assistant functions. Organizations using vulnerable MaxKB deployments are at risk.
💻 Affected Systems
- MaxKB
📦 What is this software?
Maxkb by Maxkb
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining administrative privileges, accessing sensitive AI data, and potentially pivoting to other systems.
Likely Case
Unauthorized privilege escalation allowing access to restricted MaxKB functions and potentially sensitive enterprise AI data.
If Mitigated
Limited impact with proper network segmentation and access controls, though sandbox escape still poses significant risk.
🎯 Exploit Status
Exploitation requires concurrent conditions and some level of access. No public exploit code has been identified as of current information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.0
Vendor Advisory: https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f9qm-2pxq-fx6c
Restart Required: Yes
Instructions:
1. Backup current MaxKB configuration and data. 2. Download MaxKB version 2.4.0 from official releases. 3. Stop MaxKB service. 4. Replace with patched version. 5. Restart MaxKB service. 6. Verify functionality.
🔧 Temporary Workarounds
Disable Tool Module
allTemporarily disable the vulnerable tool module to prevent exploitation
# Modify MaxKB configuration to disable tool module
# Check MaxKB documentation for specific configuration options
Network Segmentation
linuxRestrict network access to MaxKB instances
# Configure firewall rules to limit MaxKB access
# Example: iptables -A INPUT -p tcp --dport [MaxKB_port] -s [trusted_networks] -j ACCEPT
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach MaxKB instances
- Monitor for unusual privilege escalation attempts and concurrent access patterns
🔍 How to Verify
Check if Vulnerable:
Check MaxKB version via web interface or configuration files. Versions 2.3.1 and below are vulnerable.Check Version:
# Check MaxKB version in web interface or via API endpointVerify Fix Applied:
Verify MaxKB version is 2.4.0 or higher and test tool module functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual concurrent tool module executions
- Privilege escalation attempts
- Sandbox escape related errors
Network Indicators:
- Multiple concurrent connections to tool module endpoints
- Unusual API calls to privilege-related functions
SIEM Query:
source="maxkb" AND (event_type="tool_execution" OR event_type="privilege_change") AND count > threshold