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WordPress plugin

Contact Form Builder Plugin: Multi Step Contact Form, Payment Form, Custom Contact Form Plugin by Bit Form <= 2.10.1 — Unauthenticated Insecure Direct Object Reference to Form Submission Alteration

CVE-2024-1640Published · Updated

Action summary

Affected: ≤2.10.1Update to 2.10.2 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-639 Authorization Bypass Through User-Controlled Key
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder bit-form

  1. Affected≤ 2.10.1
  2. Patched in2.10.2

Update to 2.10.2 or newer.

You are affected if you run ≤ 2.10.1. Version 2.10.2 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom 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 2.10.2, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Lucio Sá.

The Contact Form Builder Plugin: Multi Step Contact Form, Payment Form, Custom Contact Form Plugin by Bit Form plugin for WordPress is vulnerable to unauthorized modification of data due to a insufficient user validation on the bitforms_update_form_entry AJAX action in all versions up to, and including, 2.10.1. This makes it possible for unauthenticated attackers to modify form submissions.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder

All 28
More vulnerabilities in Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder
SeverityVulnerabilityCVEPublished
Medium6.5Authenticated (Administrator+) SQL Injection via 'filterText' Parameter
≤3.2.0Update to 3.2.1
CVE-2026-16810
Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting
<3.1.4Update to 3.1.4
CVE-2025-15669
Medium5.3Missing Authorization to Unauthenticated Unauthorized Form Submission
<3.1.2Update to 3.1.2
CVE-2026-15054
High7.2Unauthenticated Stored Cross-Site Scripting
≤3.1.0Update to 3.2.0
CVE-2026-16573
High7.1Authenticated (Subscriber+) Arbitrary File Deletion via '_old' Parameter
≤3.1.1Update to 3.1.2
CVE-2026-14372

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  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.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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