CVE-2026-3851 Cross-site scripting in Divi
Authenticated attackers can inject arbitrary scripts via legacy JSON format in Divi theme, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3851?
CVE-2026-3851 is a medium-severity cross-site scripting vulnerability in Elegant Themes Divi, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Divi theme for WordPress is vulnerable to Stored Cross-Site Scripting via the Dynamic Content feature's legacy JSON format in all versions up to, and including, 4.27.6. This is due to two compounding flaws: (1) the save-time sanitization filter `et_builder_sanitize_dynamic_content_fields()` only searches for dynamic content markers in the `@ET-DC@...@` format, but the rendering engine also supports a legacy JSON format that is silently converted at render time, completely bypassing the save-time filter, and (2) the `post_meta_key` resolver in `et_builder_filter_resolve_default_dynamic_content()` does not apply `wp_kses_post()` to the resolved meta value when `enable_html` is set to `on`, passing raw `get_post_meta()` output directly to the page. 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 accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-3851?
How do I fix CVE-2026-3851?
No fix has been published for CVE-2026-3851 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3851 being exploited?
There is no known exploitation of CVE-2026-3851 in the wild and no public exploit code.
Sources
Also known as GHSA-rp2j-7c4f-r683.