Arbitrary Code Execution Vulnerability in Mattermost Products

CVE-2025-9079

What is CVE-2025-9079?

CVE-2025-9079 refers to a critical vulnerability within Mattermost products, an open-source communication platform primarily designed for team collaboration and messaging. This vulnerability arises from inadequate validation of the import directory path configuration, which affects specific versions of Mattermost, including 10.8.x, 10.5.x, 9.11.x, 10.10.x, and 10.9.x. As a result, an admin user can exploit this flaw to execute arbitrary code by uploading a malicious plugin to the prepackaged plugins directory. This could undermine the integrity and security of the Mattermost environment, potentially allowing unauthorized actions, data manipulation, or server control, thereby jeopardizing organizational security and operations.

Potential impact of CVE-2025-9079

1. Arbitrary Code Execution: The most critical impact is the ability for attackers to execute arbitrary code within the Mattermost server environment. This can lead to unauthorized installation of software, data theft, and full administrative control over systems.

2. Compromise of Sensitive Data: Through successful exploitation, sensitive organizational data accessible via the Mattermost platform may be exposed. This includes private messages, files, and user credentials, which can be severely damaging if leaked.

3. Disruption of Services: Exploiting this vulnerability could lead to service disruptions. Attackers could manipulate or disable the Mattermost application, resulting in communication breakdowns within organizations and impacting productivity and response times to critical incidents.

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