CVE-2025-9072
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-09-16

Assigner: Mattermost, Inc.

Description
Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.
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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-2025-9072
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.5.0 (inc) to 10.5.10 (exc)
mattermost mattermost_server From 10.9.0 (inc) to 10.9.5 (exc)
mattermost mattermost_server From 10.10.0 (inc) to 10.10.2 (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

This vulnerability occurs in certain versions of Mattermost where the application fails to properly validate the 'redirect_to' parameter. An attacker can craft a malicious link that, after a user authenticates via their SAML provider, causes the user's cookies to be sent to a URL controlled by the attacker.

Impact Analysis

The vulnerability can lead to the theft of user cookies, which may allow an attacker to hijack user sessions or gain unauthorized access to user accounts, potentially compromising confidentiality and integrity of user data.

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