What is CVE-2025-55074?

CVE-2025-55074 is a low-severity vulnerability in Mattermost, classified under CWE-1426. CVSS score: 3.0/10. Published 2025-11-18.

How severe is CVE-2025-55074?

Low severity. CVSS v3 base score is 3.0 out of 10.

Vulnerability in Mattermost

CVE-2025-55074

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

Published 2025-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.0 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Mattermost — versions 10.11.0, 10.5.0, 11.0.0
Mattermost Server

Weakness classification (CWE)

CWE-1426

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2025-55074?: CVE-2025-55074 is a low-severity vulnerability in Mattermost, classified under CWE-1426. CVSS score: 3.0/10. Published 2025-11-18.
How severe is CVE-2025-55074?: Low severity. CVSS v3 base score is 3.0 out of 10.