CVE-2019-16781: Debian Linux

Medium severity, CVSS 5.4. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• WordPress WordPress: before 5.3.1 (fixed in 5.3.1)

Published 2019-12-26. Last modified 2026-06-17.