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OpenAdvisories
Medium · 5.4 CVE-2026-14556 EUVD-2026-107147GHSA-qwq5-hm76-r6p9

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

Published Oct 21, 2026 · Updated Oct 21, 2026 · Assigned by WPScan

Description

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.

Affected products

VendorProductAffectedFixed
— HappyForms < 1.26.15 1.26.15

References