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CVE-2021-39201

MEDIUM 5.4 CVSS 3.1
Published
September 9, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
security-advisories@github.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. ### Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post `unfiltered_html`. ### Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly recommended that you keep auto-updates enabled to receive the fix. ### References https://wordpress.org/news/category/releases/ https://hackerone.com/reports/1142140 ### For more information If you have any questions or comments about this advisory: * Open an issue in [HackerOne](https://hackerone.com/wordpress)

Affected WordPress components

  • WordPress core
    Confirmed match
    From 5.0 (including) to 5.8 (excluding)

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • WordPress wordpress-develop — Version >= 5.0, < 5.8.0
  • wordpress wordpress — From 5.0 (including) to 5.8 (excluding)

References

  • github.com https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v Third Party Advisory
  • hackerone.com https://hackerone.com/reports/1142140 Permissions Required
  • www.debian.org https://www.debian.org/security/2021/dsa-4985 Third Party Advisory
  • nvd.nist.gov Official NVD record