Osom Blocks – Custom Post Type listing block, CVE-2025-5940

CVE, Research URL: CVE-2025-5940
Home page URL: Security reports for Osom Blocks – Custom Post Type listing block
Application: Osom Blocks – Custom Post Type listing block
Published on: Jun 27, 2025
Research Description: The Osom Blocks – Custom Post Type listing block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘class_name’ parameter in all versions up to, and including, 1.2.1 due to insufficient input sanitization and output 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.
Affected versions: Min -, max 1.2.1.
Status: vulnerable

Osom Blocks &#8211; Custom Post Type listing block, CVE-2025-5940