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CVE-2026-14556

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

MEDIUM
5.4
CVSS Score
Published: October 21, 2026 at 08:38 AM UTC
Updated: October 21, 2026 at 06:37 PM UTC
Products not identified yet

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

We have no canonical product record for this CVE. The source names may not have matched any product.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description
Source: cverecord
https://wpscan.com/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMWPScan
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-116

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