Executive Summary

This vulnerability affects Mattermost Desktop App versions up to 6.1, 6.0.1, and 5.4.13.0. The app fails to prevent server-rendered content from closing an underlying application view. Specifically, a malicious server or plugin can invoke the JavaScript function {{window.close()}} within the renderer context, which causes the desktop client to crash.

This leads to a denial of service (DoS) condition at the client level, meaning the application becomes unusable or stops functioning properly due to the forced closure.

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Impact Analysis

The primary impact of this vulnerability is a denial of service condition on the Mattermost Desktop client. A malicious server or plugin can crash the desktop application by forcing it to close unexpectedly.

This can disrupt communication and collaboration if you rely on the Mattermost Desktop App, causing inconvenience and potential loss of productivity.

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Mitigation Strategies

To mitigate this vulnerability, you should update the Mattermost Desktop App to a version later than 6.1, 6.0.1, or 5.4.13.0, as these versions are affected by the issue.

Additionally, stay informed about security updates by subscribing to Mattermost's Security Bulletin and regularly checking their security updates page.

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Compliance Impact

The vulnerability described allows a malicious server or plugin to crash the Mattermost Desktop App client, leading to a denial of service condition at the client level.

There is no information provided in the available context or resources about how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

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