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Mattermost Server has intermittent Authorization bypass for resource-owners

🗓️ 24 May 2022 17:21:05Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

Mattermost Server before 4.2.0, 4.1.1, 4.0.5 used as OAuth 2.0 provider may intermittently bypass resource-owner authorization, risking account takeover.

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12 Jan 2026 18:34Current
7High risk
Vulners AI Score7
CVSS 25.5
CVSS 3.18.1
EPSS0.00209
5