Description

The Allow HTML in Category Descriptions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via category descriptions in all versions up to, and including, 1.2.4. This is due to the plugin unconditionally removing the `wp_kses_data` output filter for term_description, link_description, link_notes, and user_description fields without checking user capabilities. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in category descriptions that will execute whenever a user accesses a page where the category description is displayed. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Weaknesses 1

References 3

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/allow-html-in-category-descriptions/tags/1.2.4/html-in-category-descriptions.php#L23
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/allow-html-in-category-descriptions/trunk/html-in-category-descriptions.php#L23
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b63c9a5a-fa3e-46c7-9d9c-7c209fc5713a?source=cve

Remediation