CVE-2019-7866

Vulnerability

Overview

CVE-2019-7866 is a stored cross-site scripting (XSS) vulnerability in the admin panel of Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, and Magento 2.3 prior to 2.3.2 [2]. The flaw resides in the TinyMCE editor used for editing product information, where an authenticated user with privileges to modify product data can inject arbitrary JavaScript [2].

Exploitation

To exploit this vulnerability, an attacker must have an authenticated session with administrative access to the Magento backend and the ability to edit product information [2]. The injected script is stored on the server and executed when other admin users view the affected product page, making it a persistent XSS attack [2]. No special network position is required beyond access to the admin panel.

Impact

Successful exploitation allows the attacker to execute arbitrary JavaScript in the context of the victim's admin session. This can lead to session hijacking, theft of sensitive data, defacement, or further compromise of the Magento instance [1][2]. The CVSSv3 severity is rated 5.5 (Medium) [1].

Mitigation

Adobe released security updates in Magento 2.1.18, 2.2.9, and 2.3.2 that address this vulnerability [1][4]. Users are strongly advised to upgrade to these patched versions. As of the advisory publication, no known active exploitation has been reported [1].