Authorization

2020-06-1919:15:00

PRIOn knowledge base

www.prio-n.com

8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

28.4%

JSON

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.

CPENameOperatorVersion
mattermost_servereq4.2.0 rc2
mattermost_servereq4.2.0 rc3
mattermost_servereq4.2.0 rc4
mattermost_servereq4.2.0 rc1
mattermost_serverge4.1.0
mattermost_serverlt4.1.1
mattermost_serverlt4.0.5

Name	Operator	Version
mattermost_server	eq	4.2.0 rc2
mattermost_server	eq	4.2.0 rc3
mattermost_server	eq	4.2.0 rc4
mattermost_server	eq	4.2.0 rc1
mattermost_server	ge	4.1.0
mattermost_server	lt	4.1.1
mattermost_server	lt	4.0.5

References

mattermost.com/security-updates/