Incorrect permission assignment for critical resource in Mattermost Server - CVE-2017-18894
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30205
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-2017-18894
CWE-ID: CWE-732
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 4.2.0, 4.1.1, and 4.0.5, when used as an OAuth 2.0 service provider. Sometimes. resource-owner authorization is bypassed, allowing account takeover.
Affected software
Mattermost Server
How to mitigate CVE-2017-18894
Install update from vendor's website.
Mattermost Server - update to 4.1.1