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Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms < 1.26.15 — Unauthenticated HTML Injection

CVE-2026-14556Published · Updated

Action summary

Affected: <1.26.15Update to 1.26.15 or newer

All remediation steps
Watch plugin
Severity
Medium5.8
CVSS
5.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:C Scope
Changed
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-20 Improper Input Validation
Required access
No account needed
Exploit prediction (EPSS)
0.2% chance in 30 days10th percentile
CISA KEV
Not listed
On this page8

Am I affected?

Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms happyforms

  1. Affected< 1.26.15
  2. Patched in1.26.15

Update to 1.26.15 or newer.

You are affected if you run < 1.26.15. Version 1.26.15 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 1.26.15, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to minaruzzaman shovon.

The Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms plugin for WordPress is vulnerable to HTML Injection in all versions up to 1.26.15. This is due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary HTML in pages that will render whenever a user accesses an injected page.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms

All 9
More vulnerabilities in Happyforms – Form Builder for WordPress: Drag & Drop Contact Forms, Surveys, Payments & Multipurpose Forms
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤1.26.15Update to 1.26.16
CVE-2026-97065
Medium6.6Authenticated (Admin+) Local File Inclusion
≤1.26.12Update to 1.26.13
CVE-2025-11977
High8.1Unauthenticated PHP Object Injection
≤1.26.13Update to 1.26.14
CVE-2026-49768
Medium4.4Authenticated (Admin+) Stored Cross-Site Scripting
≤1.26.2Update to 1.26.3
CVE-2024-10054
Medium6.4Authenticated (Author+) Stored Cross-Site Scripting
≤1.26.0Update to 1.26.1
CVE-2024-44063

Timeline

  1. CVE published

    Severity medium, CVSS 5.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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