CVE-2025-66419: MaxKB vulnerable to privilege escalation through sandbox bypass

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-11 · updated 2026-10-07
Weakness: CWE-362

Description

MaxKB is an open-source AI assistant for enterprise. In versions 2.3.1 and below, the tool module allows an attacker to escape the sandbox environment and escalate privileges under certain concurrent conditions. This issue is fixed in version 2.4.0.

Affected products

1Panel-dev MaxKB: before 2.4.0 — fixed in 2.4.0

How to fix

Upgrade to a fixed version: 1Panel-dev MaxKB 2.4.0. Check the vendor advisory for mitigations.

References

https://github.com/1Panel-dev/MaxKB/commit/f8ada9a110c4dbef8c3c2636c78847ecd621ece7
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.4.0
https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f9qm-2pxq-fx6c

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