CVE-2025-9084

Open redirect in OAuth login

Published Sep 15, 2025 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Mattermost versions 10.5.x <= 10.5.9 fail to properly validate redirect URLs which allows attackers to redirect users to malicious sites via crafted OAuth login URLs

Remediation

Vendor Solution

Update Mattermost to versions 10.11.0, 10.5.10 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-29172 Mattermost Open Redirect vulnerability
Github GHSA Github GHSA GHSA-hm95-jx66-g2gh Mattermost Open Redirect vulnerability
References
History
Type Values Removed Values Added
First Time appeared Mattermost mattermost
Vendors & Products Mattermost mattermost
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Mattermost versions 10.5.x <= 10.5.9 fail to properly validate redirect URLs which allows attackers to redirect users to malicious sites via crafted OAuth login URLs
Title Open redirect in OAuth login
Weaknesses CWE-601
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Sep 15, 2025, 12:24 PM
Reserved
Aug 15, 2025, 4:15 PM
Status
Analyzed
Published
Sep 15, 2025, 11:15 AM
Modified
Oct 19, 2026, 5:10 PM