PT-2025-48657 · Mattermost · Mattermost

Doyensec · CVE-2025-13870 · Published 2025-12-02 · Updated 2026-01-06

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 10.5.12 Mattermost versions 10.11.x through 10.11.4

Description An authenticated user can access files and subscribe to blocks in Boards without proper permission validation. This allows access to files from other boards and subscription to blocks from boards the user should not have access to.

Recommendations Update Mattermost to a version later than 10.5.12. Update Mattermost to a version later than 10.11.4.

Exploit

Fix

DoS

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2025-13870

GHSA-58W6-W55X-6WQ8

GO-2025-4178

SUSE-SU-2025:4395-1

SUSE-SU-2026:0037-1

Affected Products

Mattermost

References · 125

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/13xxx/CVE-2025-13870.json · Exploit
• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-13870 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0037-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4395-1 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-4178 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-13870 · Security Note
• https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149 · Note
• https://suse.com/security/cve/CVE-2025-66411 · Note
• https://suse.com/security/cve/CVE-2025-65025 · Note
• https://suse.com/security/cve/CVE-2025-64715 · Note
• https://suse.com/security/cve/CVE-2025-68938 · Note
• https://suse.com/security/cve/CVE-2017-18888 · Note
• https://suse.com/security/cve/CVE-2025-60633 · Note
• https://suse.com/security/cve/CVE-2025-65026 · Note