CVE-2021-37864

LOW

Mattermost < 6.1 - Authenticated Improper Access Control via Archived Channel API

Title source: llm

Description

Mattermost 6.1 and earlier fails to sufficiently validate permissions while viewing archived channels, which allows authenticated users to view contents of archived channels even when this is denied by system administrators by directly accessing the APIs.

References (1)

Core 1

Core References

Vendor Advisory x_refsource_misc

https://mattermost.com/security-updates/

Scores

CVSS v3 2.6

EPSS 0.0018

EPSS Percentile 38.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284 CWE-863

Status published

Products (1)

mattermost/mattermost < 6.1

Published Jan 18, 2022

Tracked Since Feb 18, 2026