# CVE-2026-3853: Elegant Themes Divi DOM-based stored XSS in video slider

Source: https://junglewise.ai/threats/cve-2026-3853-elegant-themes-divi-dom-based-stored-xss-in-video-slider  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-05. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-3853 · Severity: medium · CVSS 6.4 · Published 2026-09-05

The Divi theme for WordPress is a popular site builder and design framework used by many WordPress websites. Attackers with Contributor-level access can inject malicious scripts into video slider carousels that execute when site visitors hover over thumbnails, allowing theft of session tokens, credential harvesting, or defacement of website content.

Technologies: [Elegant Themes Divi](https://junglewise.ai/threats/technologies/divi). Vendors: [Elegant Themes](https://junglewise.ai/threats/vendors/elegant-themes).

## Quick answers

**Is CVE-2026-3853 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3853 being exploited in the wild.

**How severe is CVE-2026-3853?** Medium severity, with a CVSS score of 6.4, published 5 September 2026.

**Which products and versions are affected?** Elegant Themes Divi up to 4.27.6.

**Is there a fix for CVE-2026-3853?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-3853 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-3853?** Check whether you run Elegant Themes Divi at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a DOM-based stored cross-site scripting (XSS) flaw in the `et_pb_video_slider_item` shortcode's `image_src` attribute. The root cause is that `image_src` is not in the `$url_options` whitelist during sanitization, so it bypasses `esc_url_raw()` at save time. While the server-side rendering uses `esc_attr()` to output the value into a `data-image` attribute, client-side JavaScript in `custom.unified.js` retrieves this attribute with jQuery's `.data('image')` method, which automatically HTML-decodes the value (converting `"` back to `"`). The decoded value is then concatenated directly into HTML and injected via `jQuery.after()` without re-escaping. Exploitation requires Contributor-level or higher WordPress access; the injected payload executes when users interact with the carousel. The vulnerability affects Divi versions up to 4.27.6 and is fixed in 4.27.7 and later.

## Affected products

- Elegant Themes Divi up to 4.27.6

## Timeline

- 2026-09-05: disclosed

## References

- [https://www.divichangelog.com/divi-update/divi-4/version-4-27-7](https://www.divichangelog.com/divi-update/divi-4/version-4-27-7)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/d5de8f35-266f-45ce-8678-e52a33036b30?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/d5de8f35-266f-45ce-8678-e52a33036b30?source=cve)

## Related threats

- [Elegant Themes Divi arbitrary shortcode execution](https://junglewise.ai/threats/cve-2026-91707-elegant-themes-divi-arbitrary-shortcode-execution)
- [Elegant Themes Divi server-side request forgery in video thumbnail function](https://junglewise.ai/threats/cve-2026-4361-elegant-themes-divi-server-side-request-forgery-in-video-thumbnail)
- [Elegant Themes Divi stored XSS in Social Media Follow shortcode](https://junglewise.ai/threats/cve-2026-3852-elegant-themes-divi-stored-xss-in-social-media-follow-shortcode)
- [Elegant Themes Divi stored cross-site scripting in contact form](https://junglewise.ai/threats/cve-2026-3850-elegant-themes-divi-stored-cross-site-scripting-in-contact-form)
- [Elegant Themes Divi stored cross-site scripting in Dynamic Content](https://junglewise.ai/threats/cve-2026-3851-elegant-themes-divi-stored-cross-site-scripting-in-dynamic-content)