CVE-2026-3851

Summary

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.

Affected Software

Weaknesses

• CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/9384d32d-77a1-4794-aace-96f553302a3b?source=cve
• https://www.divichangelog.com/divi-update/divi-4/version-4-27-7

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