What is CVE-2025-62690?

CVE-2025-62690 is a low-severity vulnerability in Mattermost, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 3.1/10. Published 2025-12-17.

How severe is CVE-2025-62690?

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

Open Redirect in Mattermost

CVE-2025-62690

Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.

Vulnerability class: Open Redirect

Published 2025-12-17 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.001 (3.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Mattermost — versions 10.11.0, 11.1.0, 10.11.5
Mattermost Server

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2025-62690?: CVE-2025-62690 is a low-severity vulnerability in Mattermost, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 3.1/10. Published 2025-12-17.
How severe is CVE-2025-62690?: Low severity. CVSS v3 base score is 3.1 out of 10.