GHSA-63WG-QMRV-7Q66 Mattermost Server allows attackers to log sensitive information via DEBUG REST API logging endpoint

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows attackers to add DEBUG lines to the logs via a REST API version 3 logging endpoint...

Mattermost Server allows attackers to create buttons that can launch API requests

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows an attacker to create a button that, when pressed by a user, launches an API request...

Mattermost Server is vulnerable to XSS through display name field

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. Display names allow XSS...

GHSA-G78F-6XQ7-RRHQ Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by accessing unintended API endpoints on a user's behalf...

GHSA-WVJG-33P9-938H Mattermost Server does not properly restrict use of slash commands

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows a bypass of restrictions on use of slash commands...

Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by accessing unintended API endpoints on a user's behalf...

GHSA-876J-JFQF-M7J7 Mattermost Server exposes OAuth personal access tokens to attackers

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by using a registered OAuth application with personal access tokens...

Mattermost Server exposes OAuth personal access tokens to attackers

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by using a registered OAuth application with personal access tokens...

Mattermost Server does not properly restrict use of slash commands

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows a bypass of restrictions on use of slash commands...

GHSA-9RR5-Q43R-CCV4 Mattermost Server does not prevent System Admin from arbitrary file creation

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 create arbitrary files...

GHSA-35C4-5QFP-WXJ6 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...

GHSA-X6MW-HF2J-VQPC 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 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...

Mattermost Server does not prevent System Admin from arbitrary file creation

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 create arbitrary files...

GHSA-HJQH-J6RJ-GH8Q 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...

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 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 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-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-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...