What is CVE-2025-54499?

CVE-2025-54499 is a low-severity vulnerability in Mattermost, classified under CWE-208. CVSS score: 3.1/10. Published 2025-10-16.

How severe is CVE-2025-54499?

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

Vulnerability in Mattermost

CVE-2025-54499

Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time…

EPSS: 0.002 (15.6th percentile) — read the EPSS interpretation.

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.

Affected products

Mattermost — versions 10.5.0, 10.11.0, 10.12.0
Mattermost Mattermost_server

Weakness classification (CWE)

CWE-208

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-54499?: CVE-2025-54499 is a low-severity vulnerability in Mattermost, classified under CWE-208. CVSS score: 3.1/10. Published 2025-10-16.
How severe is CVE-2025-54499?: Low severity. CVSS v3 base score is 3.1 out of 10.