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CVE-2021-37867

Emails of all users are exposed via one of the Boards APIs

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 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Boards
CVE-2021-37864

Users can view the contents of an archived channel when access is explicitly denied by the system admin

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 3.1 · 2.6 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2022-0708

Team Creator's Email Address is disclosed to Team Members via one of the APIs

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 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2022-0903

Stack overflow in SAML login in Mattermost

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 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-0904

Stack overflow in document extractor in Mattermost

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 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-1003

Sysadmin can override existing configs & bypass restrictions like EnableUploads

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 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2022-1002

HTML Injection while inviting Guests

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 3.1 · 2 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2022-1337

OOM DoS in Mattermost image proxy

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 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-1333

A specifically drafted Playbook could trigger large amount of webhook requests leading to Denial of Service

Mattermost Playbooks plugin v1.24.0 and earlier fails to properly check the limit on the number of webhooks, which allows authenticated and authorized users to create a specifically drafted Playbook which could trigger a large amount of webhook requests leading to Denial of Service.

CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Playbooks
CVE-2022-1332

Restricted custom admin role can bypass the restrictions and view the server logs and server config.json file contents

One of the API in Mattermost version 6.4.1 and earlier fails to properly protect the permissions, which allows the authenticated members with restricted custom admin role to bypass the restrictions and view the server logs and server config.json file contents.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-1385

Invitation Email is resent as a Reminder after invalidating pending email invites

Mattermost 6.4.x and earlier fails to properly invalidate pending email invitations when the action is performed from the system console, which allows accidentally invited users to join the workspace and access information from the public teams and channels.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-1384

Authorized users are allowed to install old plugin versions from the Marketplace

Mattermost version 6.4.x and earlier fails to properly check the plugin version when a plugin is installed from the Marketplace, which allows an authenticated and an authorized user to install and exploit an old plugin version from the Marketplace which might have known vulnerabilities.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-1548

Playbook members are allowed to escalate their membership privileges and perform actions restricted to playbook admins.

Mattermost Playbooks plugin 1.25 and earlier fails to properly restrict user-level permissions, which allows playbook members to escalate their membership privileges and perform actions restricted to playbook admins.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Playbooks
CVE-2022-1982

A crafted SVG attachment can crash a Mattermost server

Uncontrolled resource consumption in Mattermost version 6.6.0 and earlier allows an authenticated attacker to crash the server via a crafted SVG attachment on a post.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
CVE-2022-2366

Incorrect defaults can cause attackers to bypass rate limitations

Incorrect default configuration for trusted IP header in Mattermost version 6.7.0 and earlier allows attacker to bypass some of the rate limitations in place or use manipulated IPs for audit logging via manipulating the request headers.

CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost Server
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