VulnCrest
Search
Create account
Report an incident
Radar sectionsDatabase
Check my site
WordPress plugin

Ninja Forms Contact Form <= 3.8.15 — Reflected Self-Based Cross-Site Scripting via Referer

CVE-2024-3866Published · Updated

Action summary

Affected: ≤3.8.15Update to 3.8.16 or newer

All remediation steps
Watch plugin
Severity
Medium4.7
CVSS
4.7
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:H Attack complexity
High
PR:N Privileges required
None
UI:R User interaction
Required
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder ninja-forms

  1. Affected≤ 3.8.15
  2. Patched in3.8.16

Update to 3.8.16 or newer.

You are affected if you run ≤ 3.8.15. Version 3.8.16 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder.
  • 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 3.8.16, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to wesley (wcraft).

The Ninja Forms Contact Form plugin for WordPress is vulnerable to Reflected Self-Based Cross-Site Scripting via the 'Referer' header in all versions up to, and including, 3.8.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation of this vulnerability requires "maintenance mode" for a targeted form to be enabled. However, there is no setting available to the attacker or even an administrator-level user to enable this mode. The mode is only enabled during a required update, which is a very short window of time. Additionally, because of the self-based nature of this vulnerability, attackers would have to rely on additional techniques to execute a supplied payload in the context of targeted user.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder

All 95
More vulnerabilities in Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder
SeverityVulnerabilityCVEPublished
Medium6.1Reflected DOM-Based Cross-Site Scripting via 'querystring:<key>' URL Parameter
≤3.15.5Update to 3.15.6
CVE-2026-100151
Medium6.5Unauthenticated Arbitrary Shortcode Execution via 'formData' Field Value via Success Message Merge Tag
≤3.15.5Update to 3.15.6
CVE-2026-100155
Medium5.4Authenticated (Subscriber+) Arbitrary Shortcode Execution via '{wp:user_display_name}' Merge Tag via display_name
≤3.15.5Update to 3.15.6
CVE-2026-101326
High7.2Unauthenticated Stored Cross-Site Scripting via 'extra' Parameter via Metadata Key Normalization
≤3.15.5Update to 3.15.6
CVE-2026-109997
Medium5.8Unauthenticated CSV Injection
≤3.15.3Update to 3.15.4
CVE-2026-67187

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 4.7

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. 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.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

How we use these sources

Search VulnCrest Radar

Jump to

Are you sure?