CVE-2023-5196

DoS via Channel Notification Properties

Published Sep 29, 2023 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.



Remediation

Vendor Solution

Update Mattermost Server to versions 7.8.10, 8.0.2, 8.1.1 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-2399 Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.
Github GHSA Github GHSA GHSA-33r7-wjfc-7w98 Mattermost Uncontrolled Resource Consumption vulnerability
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 20, 2024, 4:02 PM
Reserved
Sep 26, 2023, 9:37 AM
Status
Modified
Published
Sep 29, 2023, 10:15 AM
Modified
Jun 17, 2026, 6:48 AM