CVE-2026-4665 WP Carousel Free <= 2.7.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'data-caption' Attribute
Authenticated contributors can inject arbitrary scripts via crafted carousel attributes, leading to code execution when users interact with the lightbox.
- 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-2026-4665?
CVE-2026-4665 is a medium-severity cross-site scripting vulnerability in shapedplugin Carousel, Slider, Photo Gallery with Lightbox, Video Slider, by WP Carousel, published on 5 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP Carousel Free plugin for WordPress is vulnerable to Stored Cross-Site Scripting via crafted fancybox `data-caption` attributes in all versions up to, and including, 2.7.10. This is due to the `fancybox-config.js` script reading the carousel container's `id` attribute directly from the DOM to construct a jQuery selector without sanitization. When a Contributor crafts an HTML block with a malformed carousel container ID (containing characters invalid for jQuery selectors), the custom fancybox configuration throws a JavaScript error and fails to initialize. This causes the bundled fancybox library (v3.5.7) to fall back to its default caption handling, which renders the `data-caption` attribute content as raw HTML. Since WordPress allows `data-*` attributes through `wp_kses_post()`, 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 clicks an image in the crafted carousel lightbox.
Weakness: CWE-79
Which versions are affected by CVE-2026-4665?
How do I fix CVE-2026-4665?
No fix has been published for CVE-2026-4665 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-2026-4665 being exploited?
There is no known exploitation of CVE-2026-4665 in the wild and no public exploit code.
Sources
Also known as GHSA-25qx-prpj-p4hq.