What is CVE-2023-3613?

CVE-2023-3613 is a low-severity vulnerability in Mattermost Plugins, classified under Incorrect Authorization. CVSS score: 3.5/10. Published 2023-07-17.

How severe is CVE-2023-3613?

Low severity. CVSS v3 base score is 3.5 out of 10.

Auth bypass in Mattermost Plugins

CVE-2023-3613

Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.

Vulnerability class: Broken Access Control

Published 2023-07-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (19.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.7% 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 Plugins — versions 0, 7.8.6, 7.10.3
Mattermost Server

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2023-3613?: CVE-2023-3613 is a low-severity vulnerability in Mattermost Plugins, classified under Incorrect Authorization. CVSS score: 3.5/10. Published 2023-07-17.
How severe is CVE-2023-3613?: Low severity. CVSS v3 base score is 3.5 out of 10.