CVE-2020-13666: Drupal

Medium severity, CVSS 6.1. EPSS: 2.9% chance of exploitation in the next 30 days.

Cross-site scripting vulnerability in Drupal Core. Drupal AJAX API does not disable JSONP by default, allowing for an XSS attack. This issue affects: Drupal Drupal Core 7.x versions prior to 7.73; 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.

Affected products

• Drupal Drupal: from 7.0, before 7.73 (fixed in 7.73); from 8.8.0, before 8.8.10 (fixed in 8.8.10); from 8.9.0, before 8.9.6 (fixed in 8.9.6); from 9.0.0, before 9.0.6 (fixed in 9.0.6)

Published 2021-05-05. Last modified 2026-06-17.