CVE-2025-9084
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-09-16

Assigner: Mattermost, Inc.

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
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Meta Information
Published
2025-09-15
Last Modified
2025-09-16
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-14
NVD
CVE-2025-9084
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mattermost mattermost_server From 10.5.0 (inc) to 10.5.10 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-601 The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
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Executive Summary

Mattermost versions 10.5.x up to 10.5.9 have a vulnerability where they do not properly validate redirect URLs during OAuth login. This flaw allows attackers to craft malicious OAuth login URLs that redirect users to harmful websites.

Impact Analysis

This vulnerability can lead users to be redirected to malicious sites, potentially exposing them to phishing attacks or other harmful activities. Although it does not directly compromise confidentiality or availability, it can lead to limited integrity issues by misleading users.

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