CVE-2024-24988

Excessive resource consumption when sending long emoji names in user custom status

Published Feb 29, 2024 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Update Mattermost Server to versions 9.4.0, 9.3.1, 9.2.5, 8.1.9 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0537 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.
Github GHSA Github GHSA GHSA-6mx3-9qfh-77gj Mattermost denial of service through long emoji value
References
History
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server
Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 1, 2024, 11:36 PM
Reserved
Feb 26, 2024, 8:14 AM
Status
Analyzed
Published
Feb 29, 2024, 8:15 AM
Modified
Jun 17, 2026, 7:15 AM