CVE-2025-27715

LOW EPSS 10.1%

Published Mar 21, 20251y ago · Modified Jun 17, 20261w ago

2.7 CVSS 3.1

Low

Published Mar 21, 2025 1y ago

Last Modified Jun 17, 2026 1w ago

Description

Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.

CVSS Details

Base Score

2.7

Exploitability

1.2

Impact

1.4

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required High

User Interaction None

Scope Unchanged

Confidentiality None

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

10.1% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 1

Vendor	Product	Version	Range
mattermost	mattermost_server	*	≥9.11.0 – <9.11.9

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.