CVE-2017-18894

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.1 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 43%
VendorProductVersion
mattermostmattermost_server
𝑥
< 4.0.5
mattermostmattermost_server
4.1.0 ≤
𝑥
< 4.1.1
mattermostmattermost_server
4.2.0:rc1
mattermostmattermost_server
4.2.0:rc2
mattermostmattermost_server
4.2.0:rc3
mattermostmattermost_server
4.2.0:rc4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://mattermost.com/security-updates/
https://mattermost.com/security-updates/