CVE-2026-14556 PUBLISHED

HappyForms < 1.26.15 - Unauthenticated HTML Injection in Admin Notification Email via client_referer

Assigner: WPScan
Reserved: 03.07.2026 Published: 21.10.2026 Updated: 21.10.2026

The HappyForms WordPress plugin before 1.26.15 does not sanitise or escape a user-controlled referral value before embedding it in the form notification email, allowing unauthenticated attackers to inject arbitrary HTML into the emails site administrators receive.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS Score: 5.4

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Unknown
Product	HappyForms
Versions	Default: unaffected affected from 0 to 1.26.15 (excl.)

Credits

minaruzzaman shovon finder
WPScan coordinator

References

https://wpscan.com/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/

Problem Types

CWE-116 Improper Encoding or Escaping of Output CWE