CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0CVE-2023-2793 – Stack exhaustion in PreparePostForClientWithEmbedsAndImages
https://notcve.org/view.php?id=CVE-2023-2793
Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message. • https://mattermost.com/security-updates • CWE-400: Uncontrolled Resource Consumption •
CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2792 – Ephemeral messages return private channel contents in permalink previews
https://notcve.org/view.php?id=CVE-2023-2792
Mattermost fails to sanitize ephemeral error messages, allowing an attacker to obtain arbitrary message contents by a specially crafted /groupmsg command. • https://mattermost.com/security-updates • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 4.3EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2791 – Playbooks lets you edit arbitrary posts
https://notcve.org/view.php?id=CVE-2023-2791
When creating a playbook run via the /dialog API, Mattermost fails to validate all parameters, allowing an authenticated attacker to edit an arbitrary channel post. • https://mattermost.com/security-updates • CWE-862: Missing Authorization •
CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2788 – Deactivated user can retain access using oauth2 api
https://notcve.org/view.php?id=CVE-2023-2788
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: 0CVE-2023-2787 – Collapsed Reply Threads APIs leak message contents from private channels
https://notcve.org/view.php?id=CVE-2023-2787
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 •