CVE-2026-14556
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductHappyForms
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-116CWE-116
How to fix
Update
- HappyForms1.26.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| HappyForms | v < 1.26.15 | 1.26.15 |
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