Incorrect default permissions in Mattermost Server - CVE-2019-20889
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30240
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-20889
CWE-ID: CWE-276
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to manipulate data.
An issue was discovered in Mattermost Server before 5.7, 5.6.3, 5.5.2, and 4.10.5. It mishandles permissions for user-access token creation.
Affected software
Mattermost Server
How to mitigate CVE-2019-20889
Install update from vendor's website.
Mattermost Server - update to 5.6.3