GitHub Advisoryadvisory · Go

GHSA-69j8-prx2-vx98 Mattermost Open Redirect vulnerability

HIGH Published 2025-09-15 Modified 2025-09-16 Official page ↗
Aliases
CVE-2025-9072
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
Weaknesses
CWE-601
Reviewed
2025-09-16

Affected packages

• Go github.com/mattermost/mattermost-server: >= 10.10.0, < 10.10.2 → fixed in 10.10.2 • Go github.com/mattermost/mattermost-server: >= 10.5.0, < 10.5.10 → fixed in 10.5.10 • Go github.com/mattermost/mattermost-server: >= 10.9.0, < 10.9.5 → fixed in 10.9.5 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250731063404-9eebaadf8f72 → fixed in 8.0.0-20250731063404-9eebaadf8f72

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.

Related

Alias · CVE (1)

  • CVE-2025-9072 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… vulnerability

Weakness · CWE (1)

  • CWE-601 URL Redirection to Untrusted Site weakness

References