CVE-2025-9072 — One-Click Mattermost Account Takeover via Poisoned RelayState SAML Parameter
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 …
Published: 2025-09-15 · CVSS: 7.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7