Vulnerabilities (CVE)

Filtered by vendor Mattermost Subscribe
Total 577 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2024-11599 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 8.2 HIGH
Mattermost versions 10.0.x <= 10.0.1, 10.1.x <= 10.1.1, 9.11.x <= 9.11.3, 9.5.x <= 9.5.11 fail to properly validate email addresses which allows an unauthenticated user to bypass email domain restrictions via carefully crafted input on email registration.
CVE-2024-11358 2 Google, Mattermost 2 Android, Mattermost Mobile 2026-06-17 N/A 5.7 MEDIUM
Mattermost Android Mobile Apps versions <=2.21.0 fail to properly configure file providers which allows an attacker with local access to access files via file provider.
CVE-2024-10241 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
Mattermost versions 9.5.x <= 9.5.9 fail to properly filter the channel data when ElasticSearch is enabled which allows a user to get private channel names by using cmd+K/ctrl+K.
CVE-2024-10214 1 Mattermost 1 Mattermost 2026-06-17 N/A 3.5 LOW
Mattermost versions 9.11.X <= 9.11.1, 9.5.x <= 9.5.9 icorrectly issues two sessions when using desktop SSO - one in the browser and one in desktop with incorrect settings.
CVE-2023-7114 1 Mattermost 1 Mattermost 2026-06-17 N/A 7.1 HIGH
Mattermost version 2.10.0 and earlier fails to sanitize deeplink paths, which allows an attacker to perform CSRF attacks against the server.
CVE-2023-7113 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.7 LOW
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-2023-6727 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.1 LOW
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 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 3.7 LOW
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-2023-6459 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 5.3 MEDIUM
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-2023-6458 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 7.1 HIGH
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
CVE-2023-6202 1 Mattermost 1 Mattermost 2026-06-17 N/A 4.3 MEDIUM
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-2023-5969 1 Mattermost 1 Mattermost 2026-06-17 N/A 5.3 MEDIUM
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-2023-5968 1 Mattermost 1 Mattermost 2026-06-17 N/A 4.9 MEDIUM
Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body. 
CVE-2023-5967 1 Mattermost 1 Mattermost 2026-06-17 N/A 4.3 MEDIUM
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-2023-5920 2 Apple, Mattermost 2 Macos, Mattermost Desktop 2026-06-17 N/A 2.9 LOW
Mattermost Desktop for MacOS fails to utilize the secure keyboard input functionality provided by macOS, allowing for other processes to read the keyboard input.
CVE-2023-5876 1 Mattermost 1 Mattermost Desktop 2026-06-17 N/A 3.1 LOW
Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.
CVE-2023-5875 1 Mattermost 1 Mattermost Desktop 2026-06-17 N/A 3.7 LOW
Mattermost Desktop fails to correctly handle permissions or prompt the user for consent on certain sensitive ones allowing media exploitation from a malicious mattermost server
CVE-2023-5522 1 Mattermost 1 Mattermost 2026-06-17 N/A 4.3 MEDIUM
Mattermost Mobile fails to limit the maximum number of Markdown elements in a post allowing an attacker to send a post with hundreds of emojis to a channel and freeze the mobile app of users when viewing that particular channel. 
CVE-2023-5339 1 Mattermost 1 Mattermost Desktop 2026-06-17 N/A 4.7 MEDIUM
Mattermost Desktop fails to set an appropriate log level during initial run after fresh installation resulting in logging all keystrokes including password entry being logged. 
CVE-2023-5333 1 Mattermost 1 Mattermost Server 2026-06-17 N/A 4.3 MEDIUM
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.