Description
The bbp Style Pack plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 6.4.5 via the Topic Form Additional Fields feature. This is due to insufficient input sanitization in bsp_topic_fields_form_save() (which writes $_POST['bsp_topic_fields_label{n}'] directly to post meta via update_post_meta() with no filtering) and missing output escaping in bsp_topic_content_append_topic_fields() (which concatenates the stored meta value into an HTML <span> and echoes it via apply_filters/echo without esc_html()). This makes it possible for authenticated attackers, with Subscriber-level access and above (who have bbPress topic-creation privileges), to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, including unauthenticated visitors.
Problem types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Product status
Any version
Timeline
| 2026-07-09: | Vendor Notified |
| 2026-07-10: | Disclosed |
Credits
Catalin Oancea (0x4D5A)
References
www.wordfence.com/...-2d63-458d-b19b-4e2b6f4a0f3b?source=cve
plugins.trac.wordpress.org/...des/functions_topic_fields.php
plugins.trac.wordpress.org/...des/functions_topic_fields.php
plugins.trac.wordpress.org/...k&new=3601461%40bbp-style-pack