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CVE-2026-19862mediumCWE-93

JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 4.8epss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
Unknown · JetFormBuilder
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.