CVE-2026-2430 Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via Lazy-loaded Image Attributes
Authenticated attackers can inject arbitrary scripts via crafted image tags in the Autoptimize WordPress plugin, leading to stored XSS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-2430?
CVE-2026-2430 is a medium-severity cross-site scripting vulnerability in optimizingmatters Autoptimize, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-2430?
How do I fix CVE-2026-2430?
No fix has been published for CVE-2026-2430 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-2430 being exploited?
There is no known exploitation of CVE-2026-2430 in the wild and no public exploit code.
Sources
Also known as GHSA-8wqg-98qw-6h95.