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6.4

Autoptimize plugin for WordPress allows attackers to inject malicious scripts

CVE-2026-2352
Summary

The Autoptimize plugin for WordPress is vulnerable to a security threat that could allow attackers to inject malicious code into a website. This means that if an attacker has permission to edit the website, they could potentially inject malicious scripts that could affect users who visit the site. To protect your site, update the Autoptimize plugin to the latest version or consider uninstalling it if you don't need its features.

Original title
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 inpu...
Original 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.
nvd CVSS3.1 6.4
Vulnerability type
CWE-79 Cross-site Scripting (XSS)
Published: 21 Mar 2026 · Updated: 21 Mar 2026 · First seen: 21 Mar 2026