What’s Vulnerable › Vulnerabilities
CVE-2024-24988: Excessive resource consumption when sending long emoji names in user custom status
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-02-29 · updated 2026-06-17
- Weakness: CWE-400
Description
Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.
Affected products
- Mattermost: before 8.1.8; from 9.0.0 before 9.1.5; from 9.2.0 before 9.2.4 — fixed in 8.1.8, 9.1.5, 9.2.4
How to fix
Upgrade to a fixed version: Mattermost 8.1.8, 9.1.5, 9.2.4. Check the vendor advisory for mitigations.
References
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