CVE-2021-39202

MEDIUM 5.4CVE-2021-39202 · Published 09/09/2021 · updated 17/06/2026

Package	Affected versions	Patched versions
wordpress wordpress	`= 5.8`	No fix yet

Description

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions the widgets editor introduced in WordPress 5.8 beta 1 has improper handling of HTML input in the Custom HTML feature. This leads to stored XSS in the custom HTML widget. This has been patched in WordPress 5.8. It was only present during the testing/beta phase of WordPress 5.8.

References

WordPress/wordpress-develop security advisory · Third Party Advisory
hackerone.com/reports/1222797 · Permissions Required

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