CVE-2022-2401

Team members could access sensitive information of other users via an API call

Unrestricted information disclosure of all users in Mattermost version 6.7.0 and earlier allows team members to access some sensitive information by directly accessing the APIs.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2022-2406

Malicious imports can lead to Denial of Service

The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2022-2408

Guest accounts can list all public channels

The Guest account feature in Mattermost version 6.7.0 and earlier fails to properly restrict the permissions, which allows a guest user to fetch a list of all public channels in the team, in spite of not being part of those channels.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2022-3147

Server-side Denial of Service while processing a specifically crafted JPEG file

Mattermost version 7.0.x and earlier fails to sufficiently limit the in-memory sizes of concurrently uploaded JPEG images, which allows authenticated users to cause resource exhaustion on specific system configurations, resulting in server-side Denial of Service.

CVSS 3.1 · 3.1 Low EPSS 1.1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2022-3257

Server-side Denial of Service while processing a specifically crafted GIF file

Mattermost version 7.1.x 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 3.1 · 3.1 Low EPSS 1.3% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2022-4019

Authenticated user could send multiple requests containing a large payload to a Playbooks API and can crash a Mattermost server

A denial-of-service vulnerability in the Mattermost Playbooks plugin allows an authenticated user to crash the server via multiple large requests to one of the Playbooks API endpoints.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2022-4044

Authenticated user could send multiple requests containing a large Auto Responder Message payload and can crash a Mattermost server

A denial-of-service vulnerability in Mattermost allows an authenticated user to crash the server via multiple large autoresponder messages.

CVSS 3.1 · 4.3 Medium EPSS 1.1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2022-4045

Authenticated user could send multiple requests containing a parameter which could fetch a large amount of data and can crash a Mattermost server

A denial-of-service vulnerability in the Mattermost allows an authenticated user to crash the server via multiple requests to one of the API endpoints which could fetch a large amount of data. 

CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-27263

IDOR: Accessing playbook runs via the Playbooks Runs API

A missing permissions check in the /plugins/playbooks/api/v0/runs API in Mattermost allows an attacker to list and view playbooks belonging to a team they are not a member of.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-27264

IDOR: Updating a playbook via the Playbooks API

A missing permissions check in Mattermost Playbooks in Mattermost allows an attacker to modify a playbook via the /plugins/playbooks/api/v0/playbooks/[playbookID] API.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-27265

Disclosure of team owner email address when regenerating Invite ID

Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the "Regenerate Invite Id" API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-27266

Disclosure of team owner email address when when accessing the teams API

Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.

CVSS 3.1 · 2.7 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1421

Reflected XSS in OAuth flow completion endpoints

A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1562

Full name revealed via /plugins/focalboard/api/v2/users

Mattermost fails to check the "Show Full Name" setting when rendering the result for the /plugins/focalboard/api/v2/users API call, allowing an attacker to learn the full name of a board owner.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost

CVE-2023-1774

Unauthorized email invite to a private channel

When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1775

Unsanitized events sent over Websocket to regular users in a High Availability environment

When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1776

Stored XSS via SVG attachment on Boards

Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1777

Information disclosure in linked message previews

Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-1831

User password logged in audit logs

Mattermost fails to redact from audit logs the user password during user creation and the user password hash in other operations if the experimental audit logging configuration was enabled (ExperimentalAuditSettings section in config).

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost Server

CVE-2023-2193

Oauth authorization codes do not expire when deauthorizing an oauth2 app

Mattermost fails to invalidate existing authorization codes when deauthorizing an OAuth2 app, allowing an attacker possessing an authorization code to generate an access token.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Mattermost

Products

Mattermost