CVE-2026-14556
HappyForms < 1.26.15 - Unauthenticated HTML Injection in Admin Notification Email via client_referer
- State
- Published
- Severity
- 5.4 Medium
- Published
- Oct 21, 2026
- Updated
- Oct 21, 2026
- Reserved
- Jul 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N | WPScan |
Weaknesses
- CWE-116 Improper Encoding or Escaping of Output
Affected Products
| Product | Versions |
|---|---|
HappyFormsUnknown |
|
References
- https://wpscan.com/vulnerability/7673862c-b37c-4c7e-af3f-c32cbd2deb23/exploitvdb-entrytechnical-description
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