CVE-2024-2445: Reflected XSS in Mattermost Jira plugin

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-15 · updated 2026-06-17
Weakness: CWE-74

Description

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.

Affected products

Mattermost: from 8.1.0 before 8.1.10; from 9.2.0 before 9.2.6; from 9.3.0 before 9.3.2; from 9.4.0 before 9.4.3 — fixed in 8.1.10, 9.2.6, 9.3.2, 9.4.3

How to fix

Upgrade to a fixed version: Mattermost 8.1.10, 9.2.6, 9.3.2, 9.4.3. Check the vendor advisory for mitigations.

References

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