WP Carousel Free <= 2.7.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'data-caption' Attribute
| CVE | CVE-2026-4665 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | May 4, 2026 |
| Last Updated | May 5, 2026 |
| Researcher |
Webbernaut
|
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.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for Carousel, Slider, Photo Gallery with Lightbox, Video Slider, by WP Carousel
| Software Type | Plugin |
|---|---|
| Software Slug | wp-carousel-free (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 2.7.11, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Carousel, Slider, Photo Gallery with Lightbox, Video Slider, by WP Carousel
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