# 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.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 May 2026
- **Updated:** 5 May 2026
- **Also known as:** GHSA-25qx-prpj-p4hq

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-4665 being exploited?

There is no known exploitation of CVE-2026-4665 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4665 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-4665 in the wild and no public exploit code.

Affected product: shapedplugin Carousel, Slider, Photo Gallery with Lightbox, Video Slider, by WP Carousel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-4665/ (Markdown: https://insights.sbomify.com/CVE-2026-4665/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4665
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4665
- OSV: https://osv.dev/vulnerability/CVE-2026-4665

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4665/
Summaries are generated and may contain mistakes; the official description above is the record.