Improper Authentication in Mattermost Server - CVE-2017-18906
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30177
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-18906
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated user to read and manipulate data.
An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2, when Single Sign-On OAuth2 is used. An attacker could claim somebody else's account.
Affected software
Mattermost Server
How to mitigate CVE-2017-18906
Install update from vendor's website.
Mattermost Server - update to 3.10.2