CVE-2023-5196

MEDIUM

Mattermost 7.0.0-7.8.9 and 8.1.0 - Denial of Service via Notification Property Length

Title source: llm

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.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 6.5

EPSS 0.0023

EPSS Percentile 45.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (3)

mattermost/mattermost 7.0.0 - 7.8.10

mattermost/mattermost 8.1.0 - 8.1.1Go

mattermost/mattermost-server 0 - 7.8.10Go

Published Sep 29, 2023

Tracked Since Feb 18, 2026