What is CVE-2022-2366?

CVE-2022-2366 is a medium-severity vulnerability in Mattermost, classified under Incorrect Default Permissions. CVSS score: 5.6/10. Published 2022-07-12.

How severe is CVE-2022-2366?

Medium severity. CVSS v3 base score is 5.6 out of 10.

Vulnerability in Mattermost

CVE-2022-2366

Incorrect default configuration for trusted IP header in Mattermost version 6.7.0 and earlier allows attacker to bypass some of the rate limitations in place or use manipulated IPs for audit logging via manipulating the request headers.

Published 2022-07-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.006 (48.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% 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 6.7.x 6.7.0, 6.x, 6.5.x
Mattermost Server — versions 6.7.0

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

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

Frequently asked questions

What is CVE-2022-2366?: CVE-2022-2366 is a medium-severity vulnerability in Mattermost, classified under Incorrect Default Permissions. CVSS score: 5.6/10. Published 2022-07-12.
How severe is CVE-2022-2366?: Medium severity. CVSS v3 base score is 5.6 out of 10.