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Mattermost

mattermost

602 CVEs • 15 products

Products (15)

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CVEs (602)

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CVSS
1Mattermost
1Mattermost Server
Jun 17, 2026
Dec 6, 2023
N/A· v4
9.8 CRITICAL· v3
N/A· v2
Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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, ni...Show more
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. Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
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 impo...Show more
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). Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
6.1 MEDIUM· v3
N/A· v2
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_log...Show more
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= Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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. 
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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 us...Show more
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.  Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
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 fie...Show more
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.  Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
5.4 MEDIUM· v3
N/A· v2
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...Show more
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.  Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 27, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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...Show more
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 Show less
1Mattermost
1Mattermost
Jun 17, 2026
Nov 6, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost
Jun 17, 2026
Nov 6, 2023
N/A· v4
4.9 MEDIUM· v3
N/A· v2
Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body. 
1Mattermost
1Mattermost
Jun 17, 2026
Nov 6, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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
1Mattermost
1Mattermost Desktop
Jun 17, 2026
Nov 2, 2023
N/A· v4
3.3 LOW· v3
N/A· v2
Mattermost Desktop for MacOS fails to utilize the secure keyboard input functionality provided by macOS, allowing for other processes to read the keyboard input.
1Mattermost
1Mattermost Desktop
Jun 17, 2026
Nov 2, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost Desktop
Jun 17, 2026
Nov 2, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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
1Mattermost
1Mattermost
Jun 17, 2026
Oct 17, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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...Show more
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.  Show less
1Mattermost
1Mattermost Desktop
Jun 17, 2026
Oct 17, 2023
N/A· v4
5.5 MEDIUM· v3
N/A· v2
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. 
1Mattermost
1Mattermost Server
Jun 17, 2026
Oct 9, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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 identi...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Oct 9, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.