Divi <= 4.27.6 - Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting via Video Slider 'image_src' Shortcode Parameter
| CVE | CVE-2026-3853 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | September 4, 2026 |
| Last Updated | September 5, 2026 |
| Researcher |
Osvaldo Noe Gonzalez Del Rio (Os)
- krei.dev | ogbuilders.io
|
Description
The Divi theme for WordPress is vulnerable to DOM-Based Stored Cross-Site Scripting via the `image_src` attribute of the `et_pb_video_slider_item` shortcode in all versions up to, and including, 4.27.6. This is due to the `image_src` field not being included in the `$url_options` whitelist (which only contains `url`, `button_link`, `button_url`), so it never receives `esc_url_raw()` at save time. On the server side, the value is rendered into a `data-image` HTML attribute using `esc_attr()`, which encodes double quotes as `"`. However, the client-side JavaScript carousel code in `custom.unified.js` reads this attribute using jQuery's `.data('image')`, which returns the browser-decoded value (with `"` decoded back to `"`). The decoded value is then concatenated directly into an HTML string and injected into the DOM via `jQuery.after()` without re-escaping. 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 hovers over the carousel thumbnail.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for Divi
| Software Type | Theme |
|---|---|
| Software Slug | Divi |
| Patched? | Yes |
| Remediation | Update to version 4.27.7, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Divi
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