Mattermost Server vulnerabilities

CVE-2023-3584 [LOW] CWE-863 CVE-2023-3584: Mattermost fails to properly check the authorization of POST /api/v4/teams when passing a team overr Mattermost fails to properly check the authorization of POST /api/v4/teams when passing a team override scheme ID in the request, allowing an authenticated attacker with knowledge of a Team Override Scheme ID to create a new team with said team override scheme.

CVE-2023-3587 [LOW] CWE-862 CVE-2023-3587: Mattermost fails to properly show information in the UI, allowing a system admin to modify a board s Mattermost fails to properly show information in the UI, allowing a system admin to modify a board state allowing any user with a valid sharing link to join the board with editor access, without the UI showing the updated permissions.

CVE-2023-3613 [LOW] CWE-863 CVE-2023-3613: Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding user Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.

CVE-2023-3614 [LOW] CWE-400 CVE-2023-3614: Mattermost fails to properly validate a gif image file, allowing an attacker to consume a significan Mattermost fails to properly validate a gif image file, allowing an attacker to consume a significant amount of server resources, making the server unresponsive for an extended period of time by linking to specially crafted image file.

CVE-2023-2515 [HIGH] CWE-863 CVE-2023-2515: Mattermost fails to restrict a user with permissions to edit other users and to create personal acce Mattermost fails to restrict a user with permissions to edit other users and to create personal access tokens from elevating their privileges to system admin

CVE-2023-2281 [MEDIUM] CWE-200 CVE-2023-2281: When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently co When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team.

CVE-2023-1831 [HIGH] CWE-200 CVE-2023-1831: Mattermost fails to redact from audit logs the user password during user creation and the user passw Mattermost fails to redact from audit logs the user password during user creation and the user password hash in other operations if the experimental audit logging configuration was enabled (ExperimentalAuditSettings section in config).

CVE-2023-1777 [MEDIUM] CWE-200 CVE-2023-1777: Mattermost allows an attacker to request a preview of an existing message when creating a new messag Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

CVE-2023-1776 [MEDIUM] CWE-79 CVE-2023-1776: Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a c Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.

CVE-2023-1774 [MEDIUM] CWE-862 CVE-2023-1774: When processing an email invite to a private channel on a team, Mattermost fails to validate the inv When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.

CVE-2023-1775 [MEDIUM] CWE-200 CVE-2023-1775: When running in a High Availability configuration, Mattermost fails to sanitize some of the user_upd When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.

CVE-2023-1421 [MEDIUM] CWE-79 CVE-2023-1421: A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.

CVE-2023-27266 [LOW] CWE-200 CVE-2023-27266: Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/u Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

CVE-2023-27265 [LOW] CWE-200 CVE-2023-27265: Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the "Regenera Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the "Regenerate Invite Id" API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

CVE-2022-3257 [MEDIUM] CWE-400 CVE-2022-3257: Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file w Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.

CVE-2022-3147 [MEDIUM] CWE-400 CVE-2022-3147: Mattermost version 7.0.x and earlier fails to sufficiently limit the in-memory sizes of concurrently Mattermost version 7.0.x and earlier fails to sufficiently limit the in-memory sizes of concurrently uploaded JPEG images, which allows authenticated users to cause resource exhaustion on specific system configurations, resulting in server-side Denial of Service.

CVE-2022-2401 [MEDIUM] CWE-200 CVE-2022-2401: Unrestricted information disclosure of all users in Mattermost version 6.7.0 and earlier allows team Unrestricted information disclosure of all users in Mattermost version 6.7.0 and earlier allows team members to access some sensitive information by directly accessing the APIs.

CVE-2022-2366 [MEDIUM] CWE-276 CVE-2022-2366: Incorrect default configuration for trusted IP header in Mattermost version 6.7.0 and earlier allows Incorrect default configuration for trusted IP header in Mattermost version 6.7.0 and earlier allows attacker to bypass some of the rate limitations in place or use manipulated IPs for audit logging via manipulating the request headers.

CVE-2022-1982 [MEDIUM] CWE-400 CVE-2022-1982: Uncontrolled resource consumption in Mattermost version 6.6.0 and earlier allows an authenticated at Uncontrolled resource consumption in Mattermost version 6.6.0 and earlier allows an authenticated attacker to crash the server via a crafted SVG attachment on a post.

CVE-2022-1384 [HIGH] CWE-477 CVE-2022-1384: Mattermost version 6.4.x and earlier fails to properly check the plugin version when a plugin is ins Mattermost version 6.4.x and earlier fails to properly check the plugin version when a plugin is installed from the Marketplace, which allows an authenticated and an authorized user to install and exploit an old plugin version from the Marketplace which might have known vulnerabilities.