Vendor
Mattermost
512 known vulnerabilities.
Products
512 results · Feed
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High 7.1
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.
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Medium 4.3
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.
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Low 3.1
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.
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Medium 4.3
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.
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Medium 4.3
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.
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Low 3.1
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 Den…
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Low 3.1
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 Serv…
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Medium 4.3
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.
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Medium 4.3
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.
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Medium 6.5
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.
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Medium 5.6
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.
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Medium 4.3
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.
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Low 3.7
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.
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Medium 4.7
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…
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Low 3.7
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.
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Medium 4.3
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.
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Low 3.5
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 leadi…
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Medium 4.3
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.
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Low 2.0
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.
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Low 3.3
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 configuration…
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Medium 4.3
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.
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Medium 5.3
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.
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Medium 4.3
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.
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Low 2.6
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.
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Medium 4.3
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.
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Medium 4.7
Session is not invalidated on server-side when user logged out of Boards
Mattermost Boards plugin v0.10.0 and earlier fails to invalidate a session on the server-side when a user logged out of Boards, which allows an attacker to reuse old session token for authorization.
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Medium 4.3
Server-side Denial of Service while processing a specifically crafted GIF file
Mattermost 6.2 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 Ser…
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Low 3.5
Mattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated a…
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Low 3.7
Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers…
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Medium 5.8
Mattermost 6.0.2 and earlier fails to sufficiently sanitize user's password in audit logs when user creation fails.
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Low 3.7
Cross-site Scripting in Mattermost
Mattermost 5.38 and earlier fails to sufficiently sanitize clipboard contents, which allows a user-assisted attacker to inject arbitrary web script in product deployments that explicitly disable the default CSP.
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High 7.1
Reflected XSS in OAuth Flow
Fixed a bypass for a reflected cross-site scripting vulnerability affecting OAuth-enabled instances of Mattermost.