PT-2025-21325 · Mattermost · Mattermost

Ben Cooke · Published 2025-05-15 · Updated 2025-05-26 · CVE-2025-2527

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Mattermost versions 10.5.x through 10.5.2 Mattermost versions 9.11.x through 9.11.11

Description: The issue is related to improper verification of a user's permissions when accessing groups. This allows an attacker to view group information via an API request.

Recommendations: For Mattermost versions 10.5.x through 10.5.2, update to a version later than 10.5.2 to resolve the issue. For Mattermost versions 9.11.x through 9.11.11, update to a version later than 9.11.11 to resolve the issue. As a temporary workaround, consider restricting access to group information via API requests until a patch is available.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2025-2527

GHSA-H356-3MFW-X368

GO-2025-3691

OPENSUSE-SU-2025:15159-1

Affected Products

Mattermost

References · 26

• https://osv.dev/vulnerability/GHSA-h356-3mfw-x368 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-2527 · Security Note
• https://osv.dev/vulnerability/GO-2025-3691 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15159-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-2527 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://lists.opensuse.org/archives/list/[e-mail]/thread/NBVOKYMJCE2HZLSF5W3H3Q7KEHMMOQR3 · Note
• https://suse.com/security/cve/CVE-2024-40120 · Note
• https://suse.com/security/cve/CVE-2025-5031 · Note
• https://suse.com/security/cve/CVE-2025-47290 · Note
• https://suse.com/security/cve/CVE-2025-2527 · Note
• https://suse.com/security/cve/CVE-2025-48056 · Note
• https://suse.com/security/cve/CVE-2025-47283 · Note
• https://suse.com/security/cve/CVE-2025-31947 · Note