What is CVE-2025-66419?

CVE-2025-66419 is a high-severity vulnerability in 1panel-Dev Maxkb, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.8/10. Published 2025-12-11.

How severe is CVE-2025-66419?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in 1panel-Dev Maxkb

CVE-2025-66419

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.

Vulnerability class: Race Condition

Published 2025-12-11 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (24.0th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

1panel-Dev Maxkb — versions < 2.4.0
Maxkb

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f9qm-2pxq-fx6c (Vendor Advisory)
github.com/1Panel-dev/MaxKB/commit/f8ada9a110c4dbef8c3c2636c78847ecd621ece7 (Patch)
github.com/1Panel-dev/MaxKB/releases/tag/v2.4.0 (Release Notes)

Frequently asked questions

What is CVE-2025-66419?: CVE-2025-66419 is a high-severity vulnerability in 1panel-Dev Maxkb, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.8/10. Published 2025-12-11.
How severe is CVE-2025-66419?: High severity. CVSS v3 base score is 8.8 out of 10.