CVE-2026-19862
JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action
MEDIUM 4.8EPSS 0.2%
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 and spoof the sender. Exploitation requires the site to be configured to take one of the message's addresses from a form field.
- Affected
- JetFormBuilder
- CVSS v3.1 WPSCAN
- 4.8 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 0.15% chance of exploitation in the next 30 days, 4th percentile
- Published
- 2026-09-06