CVE-2023-50333

LOW3.7EPSS 0.07%

Mattermost allows demoted guests to change group names

Published: 1/2/2024Modified: 2/4/2026

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.

Affected packages (6)

Bitnami/mattermostfrom 0, < 8.1.7
Go/github.com/mattermost/mattermost-serverfrom 0
Go/github.com/mattermost/mattermost-server/v5from 0
Go/github.com/mattermost/mattermost-server/v6from 0
Go/github.com/mattermost/mattermost/server/v8from 0, < 8.1.7
Go/github.com/mattermost/mattermost/server/v8from 0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
osv	CVSS 3.1	LOW3.7	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L

References (5)

ADVISORYhttps://github.com/advisories/GHSA-9w97-9rqx-8v4j
ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2023-50333
PATCHhttps://github.com/mattermost/mattermost
WEBhttps://github.com/mattermost/mattermost/commit/61dd452fb2fcd3ac6f7b2e050f7f0a93a92d95fc
WEBhttps://mattermost.com/security-updates