CVE-2026-14556: HappyForms 0 to before 1.26.15

CVE-2026-14556. CVSS 3.1 base score 5.4 (MEDIUM, Vendor/CNA).

Affected technology

HappyForms · 0 to before 1.26.15
Vendor not specified by the source

Description’s affected range: before 1.26.15 does not sanitise or escape a user-controlled referral value before embedding it in the form notification email

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

Unauthenticated attackers can inject arbitrary HTML into the emails site administrators receive. Vendor/CNA’s CVSS 3.1 assessment (base score 5.4/10) rates confidentiality and integrity impact as low; availability impact as none.

Published 21-Oct-2026 16:14 UTC

CWE: CWE-116
CCR priority: 21.6 /100 (P4)
CVSS 3.1: 5.4 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N · Vendor/CNA
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-21 16:14:50.830645+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-21 16:09:05.633125+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-14556.html