EUVD-2026-21288CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
The AddFunc Head & Footer Code plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `aFhfc_head_code`, `aFhfc_body_code`, and `aFhfc_footer_code` post meta values in all versions up to, and including, 2.3. This is due to the plugin outputting these meta values without any sanitization or escaping. While the plugin restricts its own metabox and save handler to administrators via `current_user_can('manage_options')`, it does not use `register_meta()` with an `auth_callback` to protect these meta keys. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts via the WordPress Custom Fields interface that execute when an administrator previews or views the post.
Analysis
Stored cross-site scripting (XSS) in AddFunc Head & Footer Code plugin for WordPress versions up to 2.3 allows authenticated attackers with Contributor-level access to inject arbitrary JavaScript via custom post meta fields that execute when administrators preview or view posts. The vulnerability exists because the plugin outputs user-supplied code from `aFhfc_head_code`, `aFhfc_body_code`, and `aFhfc_footer_code` meta values without sanitization or escaping, and fails to restrict meta key access via WordPress `register_meta()` authentication callbacks despite restricting its own admin interface. …
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