CVE-2025-27715

Name: CVE-2025-27715
Creator: NVD / NIST
Published: 2025-03-21T09:15:13.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.7/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2025-27715 is a low-severity vulnerability rated 2.7/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

2.7/10

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

EPSS Probability

0.20%

10.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 9.11.0, < 9.11.9

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Mar 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-27715?

How severe is CVE-2025-27715?

CVE-2025-27715 has a CVSS score of 2.7/10 (LOW severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2025-27715?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-27715?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST