Auth bypass in Mattermost

CVE-2023-3591

Mattermost fails to invalidate previously generated password reset tokens when a new reset token was created.

Vulnerability class: Broken Authentication

EPSS: 0.003 (26.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Mattermost — versions 0, 7.8.7, 7.9.5
Mattermost Mattermost_server

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-3591?: CVE-2023-3591 is a medium-severity vulnerability in Mattermost, classified under Improper Authentication. CVSS score: 4.8/10. Published 2023-07-17.
How severe is CVE-2023-3591?: Medium severity. CVSS v3 base score is 4.8 out of 10.