CVE-2026-5524 Details.
Divi Form Builder <=5.1.8 - Unauthenticated Arbitrary File Upload RCE
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-5524. What It Means.
The Divi Form Builder plugin for WordPress versions 5.1.8 and prior contains an unauthenticated arbitrary file upload vulnerability in the do_image_upload() AJAX handler. The user-controlled acceptFileTypes POST parameter is injected unsanitized into a PHP regex for file extension validation. By supplying acceptFileTypes=phtml the constructed regex accepts .phtml files while the plugin's .htaccess only blocks .php, so Apache executes .phtml files as PHP. The required nonce (…
Affected Product. What Is Hit.
- Vendor
- elegantthemes
- Product
- Elegantthemes Divi Form Builder
FAQ
Common Questions.
Divi Form Builder <=5.1.8 - Unauthenticated Arbitrary File Upload RCE. The Divi Form Builder plugin for WordPress versions 5.1.8 and prior contains an unauthenticated arbitrary file upload vulnerability in the do_image_upload() AJAX handler. The user-controlled acceptFileTypes POST parameter is injected unsanitized into a PHP regex for file extension validation. By supplying acceptFileTypes=phtml the constructed regex accepts .phtml files while the plugin's .htaccess only blocks .php, so Apache executes .phtml files as PHP. The required nonce (…
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-5524 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-5524 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Elegantthemes Divi Form Builder to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-5524. Atlas does not run a check for it, so nothing here says whether a particular site is affected.