Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the GET autocomplete/GetChannelSubscriptions endpoint.

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create a channel subscription without proper access to the channel via API call to the edit channel subscription endpoint.

Mattermost fails to properly authorize the requests fetching team associated AD/LDAP groups, allowing a user to fetch details of AD/LDAP groups of a team that they are not a member of. 

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to edit a subscription for a Confluence space the user does not have access for via edit subscription endpoint.

Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to access subscription details without via API call to GET subscription endpoint.

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the Get Channel Subscriptions details endpoint.

Mattermost versions 11.5.x <= 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite endpoint.. Mattermost Advisory ID: MMSA-2026-00645

Mattermost Plugin Legal Hold versions <=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to filter invite IDs based on user permissions, which allows regular users to bypass access control restrictions and register unauthorized accounts via leaked invite IDs during team creation.. Mattermost Advisory ID: MMSA-2025-00565

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions

Mattermost versions 10.5.x <= 10.5.12, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the `/api/v4/teams/{team_id}/channels/ids` endpoint

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the {{gitlab instance {option}}} or the {{/gitlab webhook {option}}} commands. Mattermost Advisory ID: MMSA-2026-00600

Mattermost versions 10.11.x <= 10.11.12 fail to validate whether users were correctly owned by the correct Connected Workspace which allows a malicious remote server connected using the Conntexted Workspaces feature to change the displayed status of local users via the Connected Workspaces API.. Mattermost Advisory ID: MMSA-2026-00603

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID: MMSA-2025-00568

Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.

Mattermost versions 10.11.x <= 10.11.9 fail to enforce invite permissions when updating team settings, which allows team administrators without proper permissions to bypass restrictions and add users to their team via API requests. Mattermost Advisory ID: MMSA-2025-00561

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563

Mattermost fails to properly show information in the UI, allowing a system admin to modify a board state allowing any user with a valid sharing link to join the board with editor access, without the UI showing the updated permissions.

Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint.

Mattermost fails to check if the requesting user is a guest before performing different actions to public playbooks, resulting a guest being able to view, join, edit, export and archive public playbooks.

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.

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.

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

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.

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

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.

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState

Mattermost fails to delete the attachments when deleting a message in a thread allowing a simple user to still be able to access and download the attachment of a deleted message

Missing Authorization vulnerability in themesawesome History Timeline timeline-awesome allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects History Timeline: from n/a through <= 1.0.6.

Missing Authorization vulnerability in StackWC Open Close WooCommerce Store woc-open-close allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Open Close WooCommerce Store: from n/a through <= 5.0.0.

Missing Authorization vulnerability in approveme Signature Add-On for Gravity Forms gravity-signature-forms-add-on allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Signature Add-On for Gravity Forms: from n/a through <= 1.8.6.

Missing Authorization vulnerability in rsocial Revive Old Posts tweet-old-post allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Revive Old Posts: from n/a through <= 9.3.3.

Missing Authorization vulnerability in multiparcels MultiParcels Shipping For WooCommerce multiparcels-shipping-for-woocommerce allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MultiParcels Shipping For WooCommerce: from n/a through <= 1.30.12.

Missing Authorization vulnerability in extendthemes Vireo vireo allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Vireo: from n/a through <= 1.0.24.

Missing Authorization vulnerability in HaruTheme Frames frames allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Frames: from n/a through <= 1.5.7.

Missing Authorization vulnerability in HivePress HivePress Claim Listings hivepress-claim-listings allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects HivePress Claim Listings: from n/a through <= 1.1.4.

Missing Authorization vulnerability in webmaniabr Nota Fiscal Eletrônica WooCommerce nota-fiscal-eletronica-woocommerce allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nota Fiscal Eletrônica WooCommerce: from n/a through <= 3.4.0.9.

Missing Authorization vulnerability in wpshuffle WP Subscription Forms PRO wp-subscription-forms-pro allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Subscription Forms PRO: from n/a through <= 2.0.5.

Missing Authorization vulnerability in wpshuffle Subscribe To Unlock subscribe-to-unlock allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Subscribe To Unlock: from n/a through <= 1.1.5.

Missing Authorization vulnerability in payrexx Payrexx Payment Gateway for WooCommerce woo-payrexx-gateway allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Payrexx Payment Gateway for WooCommerce: from n/a through <= 3.1.5.

An issue was discovered in MISP 2.4.128. app/Controller/EventsController.php lacks an event ACL check before proceeding to allow a user to send an event contact form.

In Sylius before versions 1.6.9, 1.7.9 and 1.8.3, the user may register in a shop by email mail@example.com, verify it, change it to the mail another@domain.com and stay verified and enabled. This may lead to having accounts addressed to totally different emails, that were verified. Note, that this way one is not able to take over any existing account (guest or normal one). The issue has been patched in Sylius 1.6.9, 1.7.9 and 1.8.3. As a workaround, you may resolve this issue on your own by creating a custom event listener, which will listen to the sylius.customer.pre_update event. You can determine that email has been changed if customer email and user username are different. They are synchronized later on. Pay attention, to email changing behavior for administrators. You may need to skip this logic for them. In order to achieve this, you should either check master request path info, if it does not contain /admin prefix or adjust event triggered during customer update in the shop. You can find more information on how to customize the event here.

Missing Authorization vulnerability in frenify Categorify categorify allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Categorify: from n/a through <= 1.0.7.5.

Missing Authorization vulnerability in wpsoul Greenshift greenshift-animation-and-page-builder-blocks allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Greenshift: from n/a through <= 12.1.1.

Missing Authorization vulnerability in Themeum Qubely qubely allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Qubely: from n/a through <= 1.8.14.

Missing Authorization vulnerability in Kommo Website Chat Button: Kommo integration website-chat-button-kommo-integration allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Website Chat Button: Kommo integration: from n/a through <= 1.3.1.

Missing Authorization vulnerability in Uncanny Owl Uncanny Automator uncanny-automator allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Uncanny Automator: from n/a through <= 6.7.0.1.

Missing Authorization vulnerability in MantraBrain Ultimate Watermark ultimate-watermark allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Ultimate Watermark: from n/a through <= 1.1.