What is CVE-2024-2445?

CVE-2024-2445 is a medium-severity vulnerability in Mattermost, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2024-03-15.

How severe is CVE-2024-2445?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mattermost

CVE-2024-2445

Mattermost Jira plugin versions shipped with Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to escape user-controlled outputs when generating HTML pages, which allows an attacker to perform reflected cross-site scripting attacks against the users of the Mattermost server.

Published 2024-03-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.3% 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 9.4.0, 9.3.0, 9.2.0
Mattermost Server

Weakness classification (CWE)

References

mattermost.com/security-updates (Vendor Advisory)

Frequently asked questions

What is CVE-2024-2445?: CVE-2024-2445 is a medium-severity vulnerability in Mattermost, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2024-03-15.
How severe is CVE-2024-2445?: Medium severity. CVSS v3 base score is 6.1 out of 10.