Async JavaScript, CVE-2020-36854

CVE, Research URL: CVE-2020-36854
Home page URL: Security reports for Async JavaScript
Application: Async JavaScript
Published on: Oct 18, 2025
Research Description: The Async JavaScript plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.19.07.14. This is due to missing authorization checks on the aj_steps AJAX aciton along with a lack on sanitization on the settings saved via the function. This makes it possible for authenticated attackers with subscriber level permissions and above to inject malicious web scripts into a page that execute whenever a user accesses that page.
Affected versions: max 2.20.02.27.
Status: vulnerable