CVE-2025-9072: mattermost server from 10.5.0 (inclusive), before 10.5.10 (exclusive), from 10.9.0 (inclusive), before 10.9.5…

Affected technology

mattermost server · from 10.5.0 (inclusive), before 10.5.10 (exclusive)
mattermost

mattermost server · from 10.9.0 (inclusive), before 10.9.5 (exclusive)
mattermost

mattermost server · from 10.10.0 (inclusive), before 10.10.2 (exclusive)
mattermost

Mattermost · 10.10.0 through 10.10.1, 10.5.0 through 10.5.9, 10.9.0 through 10.9.4
Mattermost

Description’s affected range: versions 10.10.x <= 10.10.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · User interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · Low privileges required · User interaction required

What an attacker can do

An attacker can craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL. Vendor/CNA’s CVSS 3.1 assessment (base score 7.6/10) rates confidentiality and integrity impact as high; availability impact as low. NVD’s CVSS 3.1 assessment (base score 5.4/10) rates confidentiality and integrity impact as low; availability impact as none.