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