CVE-2023-5196 - CVE House
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Status published Medium CVE-2023-5196

DoS via Channel Notification Properties

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • vultza (vultza)

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
0, 8.1.0, 7.8.10, 8.1.1, 8.0.2

Timeline

Official Publish: September 29th, 2023
Last Modified: September 20th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-400

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1498 Network Denial of Service
Impact