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CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0

Mattermost fails to check if an admin user account active after an oauth2 flow is started, allowing an attacker with admin privileges to retain persistent access to Mattermost by obtaining an oauth2 access token while the attacker's account is deactivated. • https://mattermost.com/security-updates • CWE-613: Insufficient Session Expiration CWE-862: Missing Authorization •

CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0

Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API. • https://mattermost.com/security-updates • CWE-862: Missing Authorization •

CVSS: 4.3EPSS: 0%CPEs: 4EXPL: 0

Mattermost fails to properly check the permissions when executing commands allowing a member with no permissions to post a message in a channel to actually post it by executing channel commands. • https://mattermost.com/security-updates • CWE-862: Missing Authorization •

CVSS: 5.3EPSS: 0%CPEs: 3EXPL: 0

Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link. • https://mattermost.com/security-updates • CWE-20: Improper Input Validation •

CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0

Mattermost Sever fails to redact the DB username and password before emitting an application log during server initialization. • https://mattermost.com/security-updates • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-532: Insertion of Sensitive Information into Log File •