WordPress Core 5.4 - 5.8 - Authenticated Stored Cross-Site Scripting

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-39201
CVSS High (7.6)
Publicly Published September 9, 2021
Last Updated January 22, 2024
Researcher Michał Bentkowski
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)

References

1 affected software package

Software Type Core
Software Slug wordpress (view on wordpress.org)
Patched? Yes
Affected Version
  • 5.4 - 5.4.7
  • 5.5 - 5.5.6
  • 5.6 - 5.6.5
  • 5.7 - 5.7.3
  • 5.8 - 5.8.1
Patched Version
  • 5.4.7
  • 5.5.6
  • 5.6.5
  • 5.7.3
  • 5.8.1
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