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.
CVE-2026-2430 is a medium severity with CVSS 6.4 Stored Cross-Site Scripting issue affecting the Plugin Autoptimize. It affects Versions up to 3.1.14 and is fixed in 3.1.15.
CVE-2026-2430 is tracked for the Plugin Autoptimize as medium severity with CVSS 6.4. The affected range is Versions up to 3.1.14. Update Autoptimize to 3.1.15 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
autoptimize
View on wordpress.org
|
| CVE | CVE-2026-2430 |
| Patched Versions |
3.1.15
|
| Affected Versions |
Versions up to 3.1.14
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Autoptimize <= 2.7.7 - Arbitrary File Upload (and Remote Code Execution) via Import Settings
Autoptimize <= 2.7.7 - Race Condition leading to Remote Code Execution
Autoptimize <= 2.7.6 - Authenticated Arbitrary File Upload
Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'ao_post_preload' Meta Value
Autoptimize <= 3.1.13 - Authenticated (Contributor+) Stored Cross-Site Scripting
Autoptimize <= 3.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Settings
Autoptimize <= 2.8.3 - Stored Cross-Site Scripting
Autoptimize <= 3.0.4 - Sensitive Information Disclosure
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