CVE-2024-39274 — Improper Access Control in Mattermost Mattermost-server

CWE-284 — Improper Access Control5 documents4 sources
Severity
6.5MEDIUMNVD
CNA8.7
EPSS
0.2%
top 57.58%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost
Timeline
PublishedAug 1
Latest updateAug 6

Description

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDmattermost/mattermost9.5.0 — 9.5.7+3
▶Gogithub.com/mattermost_mattermost-server9.5.0+incompatible — 9.5.7+incompatible+3
▶CVEListV5mattermost/mattermost9.5.0 — 9.5.6+3

🔴Vulnerability Details

4
OSV
Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel in github.com/mattermost/mattermost-server↗2024-08-06
▶
CVEList
Malicious remote can add users to arbitrary teams and channels↗2024-08-01
▶
GHSA
Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel↗2024-08-01
▶
OSV
Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel↗2024-08-01
▶
CVE-2024-39274 — Improper Access Control | cvebase