Autoptimize, CVE-2026-2352

CVE, Research URL: CVE-2026-2352
Home page URL: Security reports for Autoptimize
Application: Autoptimize
Published on: Mar 21, 2026
Research Description: The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'ao_post_preload' meta value in all versions up to, and including, 3.1.14. This is due to insufficient input sanitization in the `ao_metabox_save()` function and missing output escaping when the value is rendered into a `<link>` tag in `autoptimizeImages.php`. 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, granted the "Image optimization" or "Lazy-load images" setting is enabled in the plugin configuration.
Affected versions: max 3.1.15.
Status: vulnerable