CVE-2026-85653

Description

The Contextual Related Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'other_attributes' Block Parameter in all versions up to, and including, 4.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-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/contextual-related-posts/tags/4.2.4/includes/frontend/blocks/class-blocks.php#L95
• https://plugins.trac.wordpress.org/browser/contextual-related-posts/tags/4.2.4/includes/frontend/class-media-handler.php#L133
• https://plugins.trac.wordpress.org/browser/contextual-related-posts/tags/4.2.4/includes/frontend/class-media-handler.php#L854
• https://plugins.trac.wordpress.org/browser/contextual-related-posts/tags/4.2.4/includes/frontend/class-media-handler.php#L972
• https://plugins.trac.wordpress.org/browser/contextual-related-posts/tags/4.4.0/includes/frontend/blocks/class-blocks.php#L95