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CVE-2025-3446: Members Without Guest Invite Permissions Can Add Guests to Teams

4.3 CVSS

Description

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.

Classification

CVE ID: CVE-2025-3446

CVSS Base Severity: MEDIUM

CVSS Base Score: 4.3

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

Problem Types

CWE-863: Incorrect Authorization

Affected Products

Vendor: Mattermost

Product: Mattermost

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 4.91% (scored less or equal to compared to others)

EPSS Date: 2025-06-13 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-3446
https://mattermost.com/security-updates

Timeline