CVE-2023-50333

LOW

Mattermost < 8.1.7 - Improper Access Control via Session Permission Update

Title source: llm

Description

Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 3.7

EPSS 0.0007

EPSS Percentile 21.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (2)

mattermost/mattermost 0 - 8.1.7Go

mattermost/mattermost_server < 8.1.7

Published Jan 02, 2024

Tracked Since Feb 18, 2026