What is CVE-2025-1412?

CVE-2025-1412 is a low-severity vulnerability in Mattermost, classified under Session Fixation. CVSS score: 3.1/10. Published 2025-02-24.

How severe is CVE-2025-1412?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Mattermost

CVE-2025-1412

Mattermost versions 9.11.x <= 9.11.6, 10.4.x <= 10.4.1 fail to invalidate all active sessions when converting a user to a bot, with allows the converted user to escalate their privileges depending on the permissions granted to the bot.

Published 2025-02-24 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (15.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% 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

Mattermost — versions 9.11.0, 10.4.0, 10.5.0
Mattermost Server

Weakness classification (CWE)

CWE-384 — Session Fixation

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2025-1412?: CVE-2025-1412 is a low-severity vulnerability in Mattermost, classified under Session Fixation. CVSS score: 3.1/10. Published 2025-02-24.
How severe is CVE-2025-1412?: Low severity. CVSS v3 base score is 3.1 out of 10.