CVE-2023-5967

MEDIUM

Mattermost < 7.8.11, 7.8.12, 8.0.0-8.0.4 - Denial of Service via Missing User Agent Header

Title source: llm

Description

Mattermost fails to properly validate requests to the Calls plugin, allowing an attacker sending a request without a User Agent header to cause a panic and crash the Calls plugin

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0010

EPSS Percentile 26.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-754

Status published

Products (3)

mattermost/mattermost < 7.8.11

mattermost/mattermost 8.0.0 - 8.0.4Go

mattermost/mattermost-server 0 - 7.8.12Go

Published Nov 06, 2023

Tracked Since Feb 18, 2026