PT-2026-6729

Name of the Vulnerable Software and Affected Versions Mattermost Confluence plugin versions prior to 1.7.0 Description The Mattermost Confluence plugin does not properly sanitize user-controlled display names when rendering HTML templates. This allows authenticated Confluence users with malicious...

GO-2026-4275 Mattermost with Jira plugin enabled has Incorrect Implementation of Authentication Algorithm in github.com/mattermost/mattermost-plugin-jira

Mattermost with Jira plugin enabled has Incorrect Implementation of Authentication Algorithm in github.com/mattermost/mattermost-plugin-jira. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is...

GO-2025-4254 Mattermost has CSRF vulnerability via Calls Widget page in github.com/mattermost/mattermost-plugin-calls

Mattermost has CSRF vulnerability via Calls Widget page in github.com/mattermost/mattermost-plugin-calls...

CVE-2025-13767 Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin

Mattermost versions 11.1.x = 11.1.0, 11.0.x = 11.0.5, 10.12.x = 10.12.3, 10.11.x = 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachmen...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm due to the authentication and issue-key path restrictions are not properly enforced. An attacker can impersonate another user and send authenticated GET and POST requests to the Jira...

GHSA-J5VQ-62GR-8V3R Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in

Mattermost versions 11.0.x = 11.0.4, 10.12.x = 10.12.2, 10.11.x = 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request...

Improper Validation of Specified Type of Input

Overview github.com/mattermost/mattermost-plugin-calls is a package for voice calling and screen sharing functionality in Mattermost channels. Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input via the WebSocket request handling. An attacker can cau...

Cross-site Request Forgery (CSRF)

Overview github.com/mattermost/mattermost-plugin-calls/server is a package that enables voice calling and screen sharing functionality in Mattermost channels Affected versions of this package are vulnerable to Cross-site Request Forgery CSRF via the Calls widget page. An attacker can initiate cal...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the MSTeams plugin OAuth flow. An attacker can modify arbitrary posts by sending a crafted OAuth redirect URL. Remediation Upgrade github.com/mattermost/mattermost/server/channels/api4 to...

EUVD-2024-2535

Malicious code in bioql PyPI...

EUVD-2022-1604

Malicious code in bioql PyPI...

EUVD-2023-44262

Malicious code in bioql PyPI...

Improper Access Control

github.com/mattermost/mattermost-plugin-confluence is vulnerable to Improper Access Control. The vulnerability is due to missing access checks on the Confluence space when editing subscriptions, which allows an attacker to modify subscriptions for spaces they do not have access to via the edit...

Improper Access Control

github.com/mattermost/mattermost-plugin-confluence is vulnerable to Improper Access Control. The vulnerability is due to a failure to verify user access to a channel, which allows an attacker to retrieve channel subscription details without proper authorization via the API endpoint...

Improper Authorization

github.com/mattermost/mattermost-plugin-confluence is vulnerable to improper authorization. The vulnerability is due to failing to check user authorization in the Mattermost instance, which allows an attacker to create a channel subscription without proper authorization via an API call to the...

SUSE CVE-2025-53514

Mattermost Confluence Plugin version 1.5.0 fails to handle unexpected request body which allows attackers to crash the plugin via constant hit to server webhook endpoint with an invalid request body...

SUSE CVE-2025-53910

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...

SUSE CVE-2025-54458

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

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization due to improper validating access controls at time of access. An attacker can gain unauthorized access to thread content by leveraging AI-generated posts. Remediation Upgrade...

CVE-2025-36530 Import Path Traversal Enables Unauthorized Unsigned Plugin Installation

Mattermost versions 10.9.x = 10.9.1, 10.8.x = 10.8.3, 10.5.x = 10.5.8, 9.11.x = 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin...