CVSS 3.1 Score 4.4 of 10 (medium)


Published Oct 20, 2023
Updated: Nov 7, 2023


CVE-2023-4021 is a vulnerability affecting the Modern Events Calendar lite plugin for WordPress in versions up to 7.1.0. It allows authenticated attackers with administrator-level permissions to execute arbitrary web scripts through Stored Cross-Site Scripting (XSS) via Google API key and Calendar ID. The vulnerability arises due to insufficient input sanitization and output escaping. This vulnerability only impacts multi-site installations and installations where unfiltered_html is disabled. To remediate this vulnerability, users should update their plugin to version 7.1.0 or above. The potential danger of this vulnerability is that it allows attackers to inject malicious scripts, which can lead to unauthorized access, data theft, or the compromise of user interactions on the affected website.


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