CVE-2024-39274

MEDIUM EPSS 26.0%

Published Aug 1, 20241y ago · Modified Jun 17, 20262w ago

6.5 CVSS 3.1

Medium

Published Aug 1, 2024 1y ago

Last Modified Jun 17, 2026 2w ago

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 Details

Base Score

6.5

Exploitability

2.8

Impact

3.6

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

26.0% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-284

Affected Products 4

Vendor	Product	Version	Range
mattermost	mattermost	*	≥9.5.0 – <9.5.7
mattermost	mattermost	*	≥9.7.0 – <9.7.6
mattermost	mattermost	*	≥9.8.0 – <9.8.2
mattermost	mattermost	9.9.0	any

References 1

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

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.