Description
In WordPress before 5.3.1, authenticated users with lower privileges (like contributors) can inject JavaScript code in the block editor, which is executed within the dashboard. It can lead to an admin opening the affected post in the editor leading to XSS.
Remediation
References
Related Vulnerabilities
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WordPress Plugin Pricing Table by Supsystic Multiple Vulnerabilities (1.8.7)
Moodle Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2014-3545)