Mattermost: Security Vulnerabilities
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.
CVSS Score
4.3
EPSS Score
0.003
Published
2023-03-31
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.
CVSS Score
7.3
EPSS Score
0.007
Published
2023-03-31
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.
CVSS Score
6.5
EPSS Score
0.003
Published
2023-03-31
Mattermost fails to check the "Show Full Name" setting when rendering the result for the /plugins/focalboard/api/v2/users API call, allowing an attacker to learn the full name of a board owner.
CVSS Score
3.5
EPSS Score
0.002
Published
2023-03-22
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.
CVSS Score
3.5
EPSS Score
0.017
Published
2023-03-15
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.
CVSS Score
2.7
EPSS Score
0.002
Published
2023-02-27
A missing permissions check in the /plugins/playbooks/api/v0/runs API in Mattermost allows an attacker to list and view playbooks belonging to a team they are not a member of.
CVSS Score
4.3
EPSS Score
0.002
Published
2023-02-27
A missing permissions check in Mattermost Playbooks in Mattermost allows an attacker to modify a playbook via the /plugins/playbooks/api/v0/playbooks/[playbookID] API.
CVSS Score
7.1
EPSS Score
0.001
Published
2023-02-27
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.
CVSS Score
2.7
EPSS Score
0.002
Published
2023-02-27
A denial-of-service vulnerability in the Mattermost allows an authenticated user to crash the server via multiple requests to one of the API endpoints which could fetch a large amount of data.
CVSS Score
3.1
EPSS Score
0.005
Published
2022-11-23