Archiving a team broadcasts unsanitized data over WebSockets

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.

Unrestricted navigation due to unvalidated mattermost server redirection

Mattermost Desktop App fails to validate a mattermost server redirection and navigates to an arbitrary website

Privilege escalation to system admin via personal access tokens

Mattermost fails to restrict a user with permissions to edit other users and to create personal access tokens from elevating their privileges to system admin

DB username/password revealed in application logs

Mattermost Sever fails to redact the DB username and password before emitting an application log during server initialization. 

Lack of URL normalization allows rendering previews for disallowed domains

Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link.

App Framework does not checks for the secret provided in the incoming webhook request

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

Apps Framework allows install requests from regular members via an internal path

Mattermost fails to verify if the requestor is a sysadmin or not, before allowing `install` requests to the Apps allowing a regular user send install requests to the Apps.

Channel commands execution doesn't properly verify permissions

Mattermost fails to properly check the permissions when executing commands allowing a member with no permissions to post a message in a channel to actually post it by executing channel commands.

Collapsed Reply Threads APIs leak message contents from private channels

Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.

Deactivated user can retain access using oauth2 api

Mattermost fails to check if an admin user account active after an oauth2 flow is started, allowing an attacker with admin privileges to retain persistent access to Mattermost by obtaining an oauth2 access token while the attacker's account is deactivated.

Playbooks lets you edit arbitrary posts

When creating a playbook run via the /dialog API, Mattermost fails to validate all parameters, allowing an authenticated attacker to edit an arbitrary channel post.

Ephemeral messages return private channel contents in permalink previews

Mattermost fails to sanitize ephemeral error messages, allowing an attacker to obtain arbitrary message contents by a specially crafted /groupmsg command.

Stack exhaustion in PreparePostForClientWithEmbedsAndImages

Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message.

Path traversal in GitHub plugin's code preview feature

Mattermost fails to sanitize code permalinks, allowing an attacker to preview code from private repositories by posting a specially crafted permalink on a channel.

Denial of Service while unescaping a Markdown string

Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.

Specially crafted search query can cause large log entries in postgres

Mattermost fails to properly truncate the postgres error log message of a search query failure allowing an attacker to cause the creation of large log files which can result in Denial of Service

Apache Syncope: HTML tags can be injected into Console or Enduser text fields

When editing a user, group or any object in the Syncope Console, HTML tags could be added to any text field and could lead to potential exploits. The same vulnerability was found in the Syncope Enduser, when editing “Personal Information” or “User Requests”. Users are recommended to upgrade to version 3.0.8, which fixes this issue.

laravel-s 3.7.35 is vulnerable to Local File Inclusion via /src/Illuminate/Laravel.php.

Vulnerability of missing authentication for critical functions in the Wi-Fi module.Successful exploitation of this vulnerability may affect service confidentiality.

An access control issue in Registration.aspx of Temenos CWX 8.5.6 allows authenticated attackers to escalate privileges and perform arbitrary Administrative commands.