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.
Problem types
CWE‑601: URL Redirection to Untrusted Site (“Open Redirect”)
Product status
10.10.0 (semver)
10.5.0 (semver)
10.9.0 (semver)
10.11.0
10.10.2
10.5.10
10.9.5
Credits
DoyenSec
References
mattermost.com/security-updates
