Security Flaw in Mattermost Affects Multiple Versions
CVE-2025-9072

7.6HIGH

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
15 September 2025

What is CVE-2025-9072?

In Mattermost versions 10.10.x up to 10.10.1, 10.5.x up to 10.5.9, and 10.9.x up to 10.9.4, a security weakness exists in the validation of the redirect_to parameter. This oversight permits attackers to craft malicious links that may redirect users post-authentication with their SAML provider, enabling the potential exposure of user cookies to attacker-controlled sites.

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Affected Version(s)

Mattermost 10.10.0 <= 10.10.1

Mattermost 10.5.0 <= 10.5.9

Mattermost 10.9.0 <= 10.9.4

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

DoyenSec
JSON
.