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Mattermost Server

mattermost_server

Vendor: Mattermost • 452 CVEs

CVEs (452)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
2.7 LOW· v3
N/A· v2
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 update...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
5.4 MEDIUM· v3
N/A· v2
Mattermost fails to disable public Boards after the "Enable Publicly-Shared Boards" configuration option is disabled, resulting in previously-shared public Boards to remain accessible.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by posting a specially crafted boards link.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
3.1 LOW· v3
N/A· v2
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...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to verify channel membership when linking a board to a channel allowing a low-privileged authenticated user to link a Board to a private channel they don't have access to, 
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
8.1 HIGH· v3
N/A· v2
Mattermost fails to properly validate the origin of a websocket connection allowing a MITM attacker on Mattermost to access the websocket APIs.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to properly restrict requests to localhost/intranet during the interactive dialog, which could allow an attacker to perform a limited blind SSRF.
1Mattermost
1Mattermost Server
Jun 17, 2026
May 12, 2023
N/A· v4
8.8 HIGH· v3
N/A· v2
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
1Mattermost
1Mattermost Server
Jun 17, 2026
Apr 25, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
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 t...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Apr 17, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
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 sect...Show more
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). Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Mar 31, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost Server
Jun 17, 2026
Mar 31, 2023
N/A· v4
5.4 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost Server
Jun 17, 2026
Mar 31, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Mar 31, 2023
N/A· v4
5.4 MEDIUM· v3
N/A· v2
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.
1Mattermost
1Mattermost Server
Jun 17, 2026
Mar 15, 2023
N/A· v4
6.1 MEDIUM· v3
N/A· v2
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 param...Show more
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.Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Feb 27, 2023
N/A· v4
2.7 LOW· v3
N/A· v2
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...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Feb 27, 2023
N/A· v4
2.7 LOW· v3
N/A· v2
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 t...Show more
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. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Sep 23, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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...Show more
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.Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Sep 9, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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,...Show more
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.Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 14, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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.