VULNERABILITY INTELLIGENCE
CVE-2026-19862
CVSS score4.8 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-09-06
Last modified2026-09-08
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Description
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.
Weakness classification
- CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')