Mattermost: Security Vulnerabilities
The image proxy component in Mattermost version 6.4.1 and earlier allocates memory for multiple copies of a proxied image, which allows an authenticated attacker to crash the server via links to very large image files.
CVSS Score
4.3
EPSS Score
0.006
Published
2022-04-13
Mattermost 6.3.0 and earlier fails to properly sanitize the HTML content in the email invitation sent to guest users, which allows registered users with special permissions to invite guest users to inject unescaped HTML content in the email invitations.
CVSS Score
2.0
EPSS Score
0.002
Published
2022-03-18
One of the API in Mattermost version 6.3.0 and earlier fails to properly protect the permissions, which allows the system administrators to combine the two distinct privileges/capabilities in a way that allows them to override certain restricted configurations like EnableUploads.
CVSS Score
3.3
EPSS Score
0.001
Published
2022-03-18
A call stack overflow bug in the SAML login feature in Mattermost server in versions up to and including 6.3.2 allows an attacker to crash the server via submitting a maliciously crafted POST body.
CVSS Score
5.3
EPSS Score
0.003
Published
2022-03-10
A stack overflow bug in the document extractor in Mattermost Server in versions up to and including 6.3.2 allows an attacker to crash the server via submitting a maliciously crafted Apple Pages document.
CVSS Score
4.3
EPSS Score
0.004
Published
2022-03-10
Mattermost 6.3.0 and earlier fails to protect email addresses of the creator of the team via one of the APIs, which allows authenticated team members to access this information resulting in sensitive & private information disclosure.
CVSS Score
4.3
EPSS Score
0.004
Published
2022-02-21
Mattermost 6.1 and earlier fails to sufficiently validate permissions while viewing archived channels, which allows authenticated users to view contents of archived channels even when this is denied by system administrators by directly accessing the APIs.
CVSS Score
2.6
EPSS Score
0.002
Published
2022-01-18
Mattermost 6.2 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.
CVSS Score
4.3
EPSS Score
0.006
Published
2022-01-18
Mattermost Boards plugin v0.10.0 and earlier fails to invalidate a session on the server-side when a user logged out of Boards, which allows an attacker to reuse old session token for authorization.
CVSS Score
4.7
EPSS Score
0.002
Published
2022-01-18
Mattermost Boards plugin v0.10.0 and earlier fails to protect email addresses of all users via one of the Boards APIs, which allows authenticated and unauthorized users to access this information resulting in sensitive & private information disclosure.
CVSS Score
4.3
EPSS Score
0.002
Published
2022-01-18