Description
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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://mattermost.com/security-updates/
Scores
CVSS v3
8.1
EPSS
0.0021
EPSS Percentile
43.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Details
CWE
CWE-732
Status
published
Products (3)
mattermost/mattermost-server
0 - 4.0.5Go
mattermost/mattermost_server
4.2.0 rc1 (4 CPE variants)
mattermost/mattermost_server
< 4.0.5
Published
Jun 19, 2020
Tracked Since
Feb 18, 2026