PT-2025-51828 · Mattermost · Mattermost

Mario Puente · Published 2025-10-06 · Updated 2026-01-17 · CVE-2025-62690

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.4

Description The application does not properly validate redirect URLs on the /error page. This allows an attacker to redirect a victim to a malicious site by crafting a link that, when opened in a new tab, exploits this flaw. The vulnerable component is the handling of redirect URLs on the /error endpoint.

Recommendations Update to a version later than 10.11.4.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

BDU:2025-16346

CVE-2025-62690

GHSA-Q66G-Q98C-Q454

GO-2025-4248

SUSE-SU-2026:0142-1

Affected Products

Mattermost

References · 47

• https://nvd.nist.gov/vuln/detail/CVE-2025-62690 · Security Note
• https://osv.dev/vulnerability/GHSA-q66g-q98c-q454 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-62690 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-4248 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-16346 · Security Note
• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0142-1 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/mattermost/mattermost/commit/dad6bd7a1509054580a0898bbc0e026aac3b30cb · Note
• https://github.com/mattermost/mattermost/pull/34073 · Note
• https://suse.com/security/cve/CVE-2026-22688 · Note
• https://suse.com/security/cve/CVE-2026-21859 · Note
• https://suse.com/support/update/announcement/2026/suse-su-20260142-1 · Note
• https://github.com/advisories/GHSA-q66g-q98c-q454 · Note
• https://suse.com/security/cve/CVE-2025-68954 · Note