Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via Lazy-loaded Image Attributes
| CVE | CVE-2026-2430 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | March 20, 2026 |
| Last Updated | March 20, 2026 |
| Researcher |
stealthcopter
|
Description
The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the lazy-loading image processing in all versions up to, and including, 3.1.14. This is due to the use of an overly permissive regular expression in the `add_lazyload` function that replaces all occurrences of `\ssrc=` in image tags without limiting to the actual attribute. 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 by crafting an image tag where the `src` URL contains a space followed by `src=`, causing the regex to break the HTML structure and promote text inside attribute values into executable HTML attributes.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for Autoptimize
| Software Type | Plugin |
|---|---|
| Software Slug | autoptimize (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 3.1.15, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Autoptimize
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