What is CVE-2023-7113?

CVE-2023-7113 is a low-severity vulnerability in Mattermost, classified under Cross-site Scripting. CVSS score: 3.7/10. Published 2023-12-29.

How severe is CVE-2023-7113?

Low severity. CVSS v3 base score is 3.7 out of 10.

XSS in Mattermost

CVE-2023-7113

Mattermost version 8.1.6 and earlier fails to sanitize channel mention data in posts, which allows an attacker to inject markup in the web client.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% 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 — versions 0, 8.1.7, 9.2.0
Mattermost Server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2023-7113?: CVE-2023-7113 is a low-severity vulnerability in Mattermost, classified under Cross-site Scripting. CVSS score: 3.7/10. Published 2023-12-29.
How severe is CVE-2023-7113?: Low severity. CVSS v3 base score is 3.7 out of 10.