CVE-2026-2512

Description

The Code Embed plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom field meta values in all versions up to, and including, 2.5.1. This is due to the plugin's sanitization function `sec_check_post_fields()` only running on the `save_post` hook, while WordPress allows custom fields to be added via the `wp_ajax_add_meta` AJAX endpoint without triggering `save_post`. The `ce_filter()` function then outputs these unsanitized meta values directly into page content without escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References

• https://plugins.trac.wordpress.org/browser/simple-embed-code/trunk/includes/add-embeds.php#L20
• https://plugins.trac.wordpress.org/browser/simple-embed-code/trunk/includes/add-embeds.php#L84
• https://plugins.trac.wordpress.org/browser/simple-embed-code/trunk/includes/secure.php#L25
• https://plugins.trac.wordpress.org/changeset/3482994/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/375ed04b-a3cb-4e60-83c8-18bff583aaf4?source=cve