Mattermost: >> Mattermost Server >> 7.7.4 Security Vulnerabilities
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.
CVSS Score
4.3
EPSS Score
0.003
Published
2023-08-25
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.
CVSS Score
3.5
EPSS Score
0.001
Published
2023-07-17
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.
CVSS Score
4.3
EPSS Score
0.001
Published
2023-07-17
Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by posting a specially crafted boards link.
CVSS Score
4.3
EPSS Score
0.001
Published
2023-07-17
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.
CVSS Score
3.1
EPSS Score
0.004
Published
2023-04-25
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