CVE-2026-14556 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-116

References

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

FAQ

What is CVE-2026-14556?

CVE-2026-14556 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 in...

How severe is CVE-2026-14556?

CVE-2026-14556 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-14556?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.