Mattermost Server vulnerabilities

CVE-2024-24776 [MEDIUM] CWE-284 CVE-2024-24776: Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count A Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.

CVE-2024-23319 [LOW] CWE-352 CVE-2024-23319: Mattermost Jira Plugin fails to protect against logout CSRF allowing an attacker to post a specially Mattermost Jira Plugin fails to protect against logout CSRF allowing an attacker to post a specially crafted message that would disconnect a user's Jira connection in Mattermost only by viewing the message.

CVE-2023-47858 [MEDIUM] CWE-284 CVE-2023-47858: Mattermost fails to properly verify the permissions needed for viewing archived public channels,  al Mattermost fails to properly verify the permissions needed for viewing archived public channels, allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams//channels/deleted endpoint.

CVE-2023-48732 [MEDIUM] CWE-200 CVE-2023-48732: Mattermost fails to scope the WebSocket response around notified users to a each user separately res Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to everyone else in the channel.

CVE-2023-50333 [MEDIUM] CWE-284 CVE-2023-50333: Mattermost fails to update the permissions of the current session for a user who was just demoted to Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.

CVE-2023-7113 [MEDIUM] CWE-79 CVE-2023-7113: Mattermost version 8.1.6 and earlier fails to sanitize channel mention data in posts, which allows a Mattermost version 8.1.6 and earlier fails to sanitize channel mention data in posts, which allows an attacker to inject markup in the web client.

CVE-2023-49607 [HIGH] CWE-754 CVE-2023-49607: Mattermost fails to validate the type of the "reminder" body request parameter allowing an attacker Mattermost fails to validate the type of the "reminder" body request parameter allowing an attacker to crash the Playbook Plugin when updating the status dialog.

CVE-2023-45316 [HIGH] CWE-352 CVE-2023-45316: Mattermost fails to validate if a relative path is passed in /plugins/playbooks/api/v0/telemetry/run Mattermost fails to validate if a relative path is passed in /plugins/playbooks/api/v0/telemetry/run/ as a telemetry run ID, allowing an attacker to use a path traversal payload that points to a different endpoint leading to a CSRF attack.

CVE-2023-45847 [HIGH] CWE-400 CVE-2023-45847: Mattermost fails to to check the length when setting the title in a run checklist in Playbooks, allo Mattermost fails to to check the length when setting the title in a run checklist in Playbooks, allowing an attacker to send a specially crafted request and crash the Playbooks plugin

CVE-2023-6727 [MEDIUM] CWE-200 CVE-2023-6727: Mattermost fails to perform correct authorization checks when creating a playbook action, allowing u Mattermost fails to perform correct authorization checks when creating a playbook action, allowing users without access to the playbook to create playbook actions. If the playbook action created is to post a message in a channel based on specific keywords in a post, some playbook information, like the name, can be leaked.

CVE-2023-6547 [MEDIUM] CWE-284 CVE-2023-6547: Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a u Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.

CVE-2023-46701 [MEDIUM] CWE-200 CVE-2023-46701: Mattermost fails to perform authorization checks in the /plugins/playbooks/api/v0/runs/add-to-timel Mattermost fails to perform authorization checks in the /plugins/playbooks/api/v0/runs/add-to-timeline-dialog endpoint of the Playbooks plugin allowing an attacker to get limited information about a post if they know the post ID

CVE-2023-49809 [MEDIUM] CWE-400 CVE-2023-49809: Mattermost fails to handle a null request body in the /add endpoint, allowing a simple member to sen Mattermost fails to handle a null request body in the /add endpoint, allowing a simple member to send a request with null request body to that endpoint and make it crash. After a few repetitions, the plugin is disabled.

CVE-2023-49874 [MEDIUM] CWE-284 CVE-2023-49874: Mattermost fails to check whether a user is a guest when updating the tasks of a private playbook ru Mattermost fails to check whether a user is a guest when updating the tasks of a private playbook run allowing a guest to update the tasks of a private playbook run if they know the run ID.

CVE-2023-6458 [CRITICAL] CWE-74 CVE-2023-6458: Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing Mattermost webapp fails to validate route parameters in//channels/ allowing an attacker to perform a client-side path traversal.

CVE-2023-6459 [MEDIUM] CWE-200 CVE-2023-6459: Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Sin Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs.

CVE-2023-5330 [HIGH] CWE-400 CVE-2023-5330: Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable.

CVE-2023-5333 [MEDIUM] CWE-400 CVE-2023-5333: Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume Mattermost fails to deduplicate input IDs allowing a simple user to cause the application to consume excessive resources and possibly crash by sending a specially crafted request to /api/v4/users/ids with multiple identical IDs.

CVE-2023-5331 [MEDIUM] CWE-862 CVE-2023-5331: Mattermost fails to properly check the creator of an attached file when adding the file to a draft p Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.

CVE-2023-4478 [HIGH] CWE-74 CVE-2023-4478: Mattermost fails to restrict which parameters' values it takes from the request during signup allowi Mattermost fails to restrict which parameters' values it takes from the request during signup allowing an attacker to register users as inactive, thus blocking them from later accessing Mattermost without the system admin activating their accounts.