One of the changelog entries for the latest version of Ninja Forms is “Patched a redirect XSS vulnerability using code injection on our submissions page.”. In looking at the changes made in that version we found that that there was a reflected cross-site scripting (XSS) vulnerability on the plugin’s admin page Submissions that was fixed.

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This post provides insights on a vulnerability in the WordPress plugin Ninja Forms not discovered by us, where the discoverer hadn't provided the details needed for us to confirm the vulnerability while we were adding it to the data set for our service, so the rest of its contents are limited to subscribers of our service.

If you were using our service, you would have already been warned about this vulnerability if your website is vulnerable due to it. You can try out our service for free and then see the rest of the details of the vulnerability.

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Plugin Security Scorecard Grade for Ninja Forms

Checked on May 15, 2025

See issues causing the plugin to get less than A+ grade