Github.Com Mattermost Mattermost Server V8 vulnerabilities

CVE-2023-7113 [LOW] CWE-79 Mattermost Cross-site Scripting vulnerability Mattermost Cross-site Scripting vulnerability 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-2023-6458 [HIGH] CWE-22 Mattermost Injection vulnerability Mattermost Injection vulnerability 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 Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability 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-2023-48369 [MEDIUM] CWE-400 Mattermost Uncontrolled Resource Consumption vulnerability Mattermost Uncontrolled Resource Consumption vulnerability Mattermost fails to limit the log size of server logs allowing an attacker sending specially crafted requests to different endpoints to potentially overflow the log.

CVE-2023-45223 [MEDIUM] CWE-200 Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability Mattermost fails to properly validate the "Show Full Name" option in a few endpoints in Mattermost Boards, allowing a member to get the full name of another user even if the Show Full Name option was disabled.

CVE-2023-6202 [MEDIUM] CWE-284 Mattermost Improper Access Control vulnerability Mattermost Improper Access Control vulnerability Mattermost fails to perform proper authorization in the `/plugins/focalboard/api/v2/users` endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.

CVE-2023-47168 [MEDIUM] CWE-601 Mattermost Open Redirect vulnerability Mattermost Open Redirect vulnerability Mattermost fails to properly check a redirect URL parameter allowing for an open redirect was possible when the user clicked "Back to Mattermost" after providing a invalid custom url scheme in /oauth/{service}/mobile_login?redirect_to=

CVE-2023-40703 [MEDIUM] CWE-400 Mattermost Uncontrolled Resource Consumption vulnerability Mattermost Uncontrolled Resource Consumption vulnerability Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string.

CVE-2023-47865 [MEDIUM] CWE-284 Mattermost Improper Access Control vulnerability Mattermost Improper Access Control vulnerability Mattermost fails to check if hardened mode is enabled when overriding the username and/or the icon when posting a post. If settings allowed integrations to override the username and profile picture when posting, a member could also override the username and icon when making a post even if the Hardened Mode setting was enabled

CVE-2023-43754 [MEDIUM] CWE-200 Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability Mattermost Exposure of Sensitive Information to an Unauthorized Actor vulnerability Mattermost fails to check whether the "Allow users to view archived channels" setting is enabled during permalink previews display, allowing members to view permalink previews of archived channels even if the "Allow users to view archived channels" setting is disabled.

CVE-2023-48268 [MEDIUM] CWE-400 Mattermost Uncontrolled Resource Consumption vulnerability Mattermost Uncontrolled Resource Consumption vulnerability Mattermost fails to limit the amount of data extracted from compressed archives during board import in Mattermost Boards allowing an attacker to consume excessive resources, possibly leading to Denial of Service, by importing a board using a specially crafted zip (zip bomb).

CVE-2023-35075 [LOW] CWE-74 Mattermost Injection vulnerability Mattermost Injection vulnerability Mattermost fails to use innerText / textContent when setting the channel name in the webapp during autocomplete, allowing an attacker to inject HTML to a victim's page by create a channel name that is valid HTML. No XSS is possible though.

CVE-2023-5967 [MEDIUM] CWE-754 Mattermost denial of service vulnerability Mattermost denial of service vulnerability Mattermost fails to properly validate requests to the Calls plugin, allowing an attacker sending a request without a User Agent header to cause a panic and crash the Calls plugin

CVE-2023-5968 [MEDIUM] CWE-116 Mattermost password hash disclosure vulnerability Mattermost password hash disclosure vulnerability Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body.

CVE-2023-5969 [MEDIUM] CWE-400 Mattermost vulnerable to excessive memory consumption Mattermost vulnerable to excessive memory consumption Mattermost fails to properly sanitize the request to `/api/v4/redirect_location` allowing an attacker, sending a specially crafted request to `/api/v4/redirect_location`, to fill up the memory due to caching large items.

CVE-2023-5195 [MEDIUM] CWE-863 Mattermost Incorrect Authorization vulnerability Mattermost Incorrect Authorization vulnerability Mattermost fails to properly validate the permissions when soft deleting a team allowing a team member to soft delete other teams that they are not part of

CVE-2023-5194 [MEDIUM] CWE-863 Mattermost Incorrect Authorization vulnerability Mattermost Incorrect Authorization vulnerability Mattermost fails to properly validate permissions when demoting and deactivating a user allowing for a system/user manager to demote / deactivate another manager

CVE-2023-5196 [MEDIUM] CWE-400 Mattermost Uncontrolled Resource Consumption vulnerability Mattermost Uncontrolled Resource Consumption vulnerability Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.

CVE-2023-5193 [LOW] CWE-863 Mattermost Incorrect Authorization vulnerability Mattermost Incorrect Authorization vulnerability Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.

CVE-2023-5159 [LOW] CWE-863 Mattermost Incorrect Authorization vulnerability Mattermost Incorrect Authorization vulnerability Mattermost fails to properly verify the permissions when managing/updating a bot allowing a User Manager role with user edit permissions to manage/update bots.