What’s Vulnerable › Vulnerabilities
CVE-2024-4183
- Severity: medium (CVSS 6.5 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-400
Description
Mattermost versions 8.1.x before 8.1.12, 9.6.x before 9.6.1, 9.5.x before 9.5.3, 9.4.x before 9.4.5 fail to limit the number of active sessions, which allows an authenticated attacker to crash the server via repeated requests to the getSessions API after flooding the sessions table.
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
Get alerted when CVE-2024-4183 or the next vulnerability affects your stack