What’s Vulnerable › Vulnerabilities
CVE-2024-4182
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-04-26 · updated 2026-06-17
- Weakness: CWE-754
Description
Mattermost versions 9.6.0, 9.5.x before 9.5.3, 9.4.x before 9.4.5, and 8.1.x before 8.1.12 fail to handle JSON parsing errors in custom status values, which allows an authenticated attacker to crash other users' web clients via a malformed custom status.
Affected products
- Mattermost: from 8.1.0 before 8.1.12; from 9.4.0 before 9.4.5; from 9.5.0 before 9.5.3; from 9.6.0 before 9.6.1 — fixed in 8.1.12, 9.4.5, 9.5.3, 9.6.1
How to fix
Upgrade to a fixed version: Mattermost 8.1.12, 9.4.5, 9.5.3, 9.6.1. Check the vendor advisory for mitigations.
References
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