GHSA-W8CC-3H7Q-JHC3 Mattermost Server has low entropy for authorization data as an OAuth 2.0 Service Provider

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data...

Mattermost Server is vulnerable to XSS through author_link field in Slack attachments

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS could occur via the authorlink field of a Slack attachment...

Mattermost Server is vulnerable to channel invisibility DoS via misformatted post

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to cause a denial of service channel invisibility via a misformated post...

Mattermost Server exposes team creator's e-mail address to other members

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It discloses the team creator's e-mail address to members...

Mattermost Server is vulnerable to Path Traversal when files are stored locally

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can test for the existence of an arbitrary file...

Mattermost Server has low entropy for authorization data as an OAuth 2.0 Service Provider

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data...

Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS attacks could occur against an OAuth 2.0 allow/deny page...

GHSA-498J-WXWW-J897 Mattermost Server is vulnerable to XSS through author_link field in Slack attachments

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS could occur via the authorlink field of a Slack attachment...

GHSA-H564-6GC2-FCC6 Mattermost Server allows users with a session ID to revoke another users' session

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session...

GHSA-9X8X-W6G5-HX4W Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS attacks could occur against an OAuth 2.0 allow/deny page...

GHSA-8QG8-C7MW-6FJ7 Mattermost Server is vulnerable to Directory Traversal by System Admins

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can achieve directory traversal...

Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names

An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service application crash via an @ character before a JavaScript field name...

Mattermost Server is vulnerable to Directory Traversal by System Admins

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2 when local storage for files is used. A System Admin can achieve directory traversal...

Mattermost Server is vulnerable to XSS through crafted links

An issue was discovered in Mattermost Server before 2.2.0. It allows XSS via a crafted link...

Mattermost Server: Files may be rendered inline instead of downloaded, allowing script execution

An issue was discovered in Mattermost Server before 2.2.0. It allows XSS because it configures files to be opened in a browser window...

GHSA-5Q37-9874-QXCW Mattermost Server exposes information stored by a web browser

An issue was discovered in Mattermost Server before 2.2.0. It allows unintended access to information stored by a web browser...

GHSA-M78R-2X6W-QQJP Mattermost Server is vulnerable to XSS through crafted links

An issue was discovered in Mattermost Server before 2.2.0. It allows XSS via a crafted link...

GHSA-JC6W-8R7F-VMP5 Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names

An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service application crash via an @ character before a JavaScript field name...

GHSA-RM24-25XM-9454 Mattermost Server: Files may be rendered inline instead of downloaded, allowing script execution

An issue was discovered in Mattermost Server before 2.2.0. It allows XSS because it configures files to be opened in a browser window...

GHSA-G3F3-P9RC-775P Mattermost Server exposes account details to any Team Administrator

An issue was discovered in Mattermost Server before 3.0.0. It offers superfluous APIs for a Team Administrator to view account details...