← Back

Mattermost

mattermost

602 CVEs • 15 products

Products (15)

Click to collapse
Toggle

CVEs (602)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Mattermost
1Mattermost Server
Jun 17, 2026
Oct 9, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
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 unavailab...Show more
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. Show less
1Mattermost
1Mattermost
Jun 17, 2026
Oct 2, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to check the Show Full Name option at the /api/v4/teams/TEAM_ID/top/team_members endpoint 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
Sep 29, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
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...Show more
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. Show less
1Mattermost
1Mattermost
Jun 17, 2026
Sep 29, 2023
N/A· v4
5.4 MEDIUM· v3
N/A· v2
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
1Mattermost
1Mattermost
Jun 17, 2026
Sep 29, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to properly validate permissions when demoting and deactivating a user allowing for a system/user manager to demote / deactivate another manager
1Mattermost
1Mattermost
Jun 17, 2026
Sep 29, 2023
N/A· v4
2.7 LOW· v3
N/A· v2
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.
1Mattermost
1Mattermost
Jun 17, 2026
Sep 29, 2023
N/A· v4
2.7 LOW· v3
N/A· v2
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.
1Mattermost
1Mattermost Server
Jun 17, 2026
Aug 25, 2023
N/A· v4
8.2 HIGH· v3
N/A· v2
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 admi...Show more
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. Show less
1Mattermost
1Mattermost
Jun 17, 2026
Aug 11, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
Mattermost fails to sanitize post metadata during audit logging resulting in permalinks contents being logged
1Mattermost
1Mattermost
Jun 17, 2026
Aug 11, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Mattermost fails to properly validate the requesting user permissions when updating a system admin, allowing a user manager to update a system admin's details such as email, first name and last name.
1Mattermost
1Mattermost
Jun 17, 2026
Aug 11, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Mattermost fails to check if the requesting user is a guest before performing different actions to public playbooks, resulting a guest being able to view, join, edit, export and archive public playbooks.
1Mattermost
1Mattermost
Jun 17, 2026
Aug 11, 2023
N/A· v4
4.3 MEDIUM· v3
N/A· v2
Mattermost fails to delete the attachments when deleting a message in a thread allowing a simple user to still be able to access and download the attachment of a deleted message
1Mattermost
1Mattermost
Jun 17, 2026
Jul 17, 2023
N/A· v4
8.1 HIGH· v3
N/A· v2
Mattermost iOS app fails to properly validate the server certificate while initializing the TLS connection allowing a network attacker to intercept the WebSockets connection.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
3.3 LOW· v3
N/A· v2
Mattermost fails to properly validate a gif image file, allowing an attacker to consume a significant amount of server resources, making the server unresponsive for an extended period of time by linking to specially craf...Show more
Mattermost fails to properly validate a gif image file, allowing an attacker to consume a significant amount of server resources, making the server unresponsive for an extended period of time by linking to specially crafted image file. Show less
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
3.5 LOW· v3
N/A· v2
Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Mattermost fails to properly validate markdown, allowing an attacker to crash the server via a specially crafted markdown input.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
8.2 HIGH· v3
N/A· v2
Mattermost fails to invalidate previously generated password reset tokens when a new reset token was created.
1Mattermost
1Mattermost Server
Jun 17, 2026
Jul 17, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
Mattermost fails to delete card attachments in Boards, allowing an attacker to access deleted attachments.
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.