What is CVE-2025-66446?

CVE-2025-66446 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-2025-66446?

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

Vulnerability in 1panel-Dev Maxkb

CVE-2025-66446

MaxKB is an open-source AI assistant for enterprise. Versions 2.3.1 and below have improper file permissions which allow attackers to overwrite the built-in dynamic linker and other critical files, potentially resulting in privilege escalation. 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 (28.6th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.6% 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-5xx2-3q9w-jpgf (Vendor Advisory)
github.com/1Panel-dev/MaxKB/releases/tag/v2.4.0 (Release Notes)

Frequently asked questions

What is CVE-2025-66446?: CVE-2025-66446 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-2025-66446?: High severity. CVSS v3 base score is 8.8 out of 10.