CVE-2026-19862

JetFormBuilder WordPress plugin versions before 3.6.5.2 are vulnerable to unauthenticated email header injection via the Send Email action. The root cause is that the plugin does not validate or strip line breaks from address values sourced from submitted form fields before including them in outg...

CVE-2026-19862 JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action

The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients a...