CVSS: 6.8EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2831 – Denial of Service while unescaping a Markdown string
https://notcve.org/view.php?id=CVE-2023-2831
16 Jun 2023 — Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters. • https://mattermost.com/security-updates • CWE-400: Uncontrolled Resource Consumption •
CVSS: 6.8EPSS: 0%CPEs: 3EXPL: 0CVE-2023-2797 – Path traversal in GitHub plugin's code preview feature
https://notcve.org/view.php?id=CVE-2023-2797
16 Jun 2023 — Mattermost fails to sanitize code permalinks, allowing an attacker to preview code from private repositories by posting a specially crafted permalink on a channel. • https://mattermost.com/security-updates • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') •
CVSS: 6.8EPSS: 0%CPEs: 3EXPL: 0CVE-2023-2793 – Stack exhaustion in PreparePostForClientWithEmbedsAndImages
https://notcve.org/view.php?id=CVE-2023-2793
16 Jun 2023 — 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: 6.8EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2792 – Ephemeral messages return private channel contents in permalink previews
https://notcve.org/view.php?id=CVE-2023-2792
16 Jun 2023 — 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
16 Jun 2023 — 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: 7.7EPSS: 0%CPEs: 4EXPL: 0CVE-2023-2788 – Deactivated user can retain access using oauth2 api
https://notcve.org/view.php?id=CVE-2023-2788
16 Jun 2023 — 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: 6.8EPSS: 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
16 Jun 2023 — 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: 0CVE-2023-2786 – Channel commands execution doesn't properly verify permissions
https://notcve.org/view.php?id=CVE-2023-2786
16 Jun 2023 — 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. 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: 6.8EPSS: 0%CPEs: 3EXPL: 0CVE-2023-2784 – Apps Framework allows install requests from regular members via an internal path
https://notcve.org/view.php?id=CVE-2023-2784
16 Jun 2023 — Mattermost fails to verify if the requestor is a sysadmin or not, before allowing `install` requests to the Apps allowing a regular user send install requests to the Apps. • https://mattermost.com/security-updates • CWE-862: Missing Authorization •
CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 0CVE-2023-2783 – App Framework does not checks for the secret provided in the incoming webhook request
https://notcve.org/view.php?id=CVE-2023-2783
16 Jun 2023 — Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps. Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps. • https://mattermost.com/security-updates • CWE-862: Missing Authorization •