What is CVE-2025-30516?

CVE-2025-30516 is a low-severity vulnerability in Mattermost, classified under Insufficient Session Expiration. CVSS score: 2.0/10. Published 2025-04-14.

How severe is CVE-2025-30516?

Low severity. CVSS v3 base score is 2.0 out of 10.

Vulnerability in Mattermost

CVE-2025-30516

Mattermost Mobile Apps versions <=2.25.0 fail to terminate sessions during logout under certain conditions (e.g. poor connectivity), allowing unauthorized users on shared devices to access sensitive notification content via continued mobile notifications

Published 2025-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.0 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.9% 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 0, 2.26.0
Mattermost Mobile

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2025-30516?: CVE-2025-30516 is a low-severity vulnerability in Mattermost, classified under Insufficient Session Expiration. CVSS score: 2.0/10. Published 2025-04-14.
How severe is CVE-2025-30516?: Low severity. CVSS v3 base score is 2.0 out of 10.