What is CVE-2023-2193?

CVE-2023-2193 is a medium-severity vulnerability in Mattermost, classified under Missing Authorization. CVSS score: 6.5/10. Published 2023-04-20.

How severe is CVE-2023-2193?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Mattermost

CVE-2023-2193

Mattermost fails to invalidate existing authorization codes when deauthorizing an OAuth2 app, allowing an attacker possessing an authorization code to generate an access token.

Vulnerability class: Broken Access Control

Published 2023-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Mattermost — versions 7.9.1, 7.8.4, 7.10

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

mattermost.com/security-updates/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-2193?: CVE-2023-2193 is a medium-severity vulnerability in Mattermost, classified under Missing Authorization. CVSS score: 6.5/10. Published 2023-04-20.
How severe is CVE-2023-2193?: Medium severity. CVSS v3 base score is 6.5 out of 10.