The WPBakery Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the vc_custom_heading shortcode in all versions up to, and including, 8.6.1. This is due to insufficient restriction of allowed HTML tags and improper sanitization of user-supplied attributes in the font_container parameter. This makes it possible for authenticated attackers with contributor-level access or higher to inject arbitrary web scripts in posts that will execute whenever a user accesses an injected page via the vc_custom_heading shortcode with malicious tag and text attributes granted they have access to use WPBakery shortcodes.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Js Composer Plugin | — | Update js-composer plugin to version 8.7, or a newer patched version | Oct 15, 2025 | Oct 14, 2025 |
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