CVE-2026-19862 Details
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.
A vulnerability exists in the JetFormBuilder WordPress plugin in versions prior to 3.6.5.2. The issue arises because the plugin fails to properly validate or remove line breaks from address values taken from submitted form fields before including them in the headers of outgoing emails. This flaw allows unauthenticated users to inject arbitrary email headers, add hidden recipients, and spoof the sender's address. Exploitation of this vulnerability requires the site to be configured to use a form field for one of the email addresses.
Users are advised to update the JetFormBuilder WordPress plugin to version 3.6.5.2 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 6, 2026CISA-ADP
Assessed Sep 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/b3fe5552-6736-4479-9c61-c05bc3328b8e/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-93 | Improper Neutralization of CRLF Sequences ('CRLF Injection') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| JetFormBuilder | < 3.6.5.2 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 6, 2026 | CVE Modified | CISA-ADP |
| Sep 6, 2026 | New CVE Received | [email protected] |