Contact Form by Bit Form: Multi Step Form, Calculation Contact Form, Payment Contact Form & Custom Contact Form builder <= 2.15.2 — Authenticated (Administrator+) Improper Input Validation via iconUpload Function to Arbitrary File Read
CVE-2024-9507Published · Updated Action summary
Affected: ≤2.15.2Update to 2.15.3 or newer
All remediation steps- Severity
- Medium4.9
- CVSS
- 4.9CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:HPrivileges required- High
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-20 Improper Input Validation
- Required access
- Unknown
- 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
- Affected≤ 2.15.2
- Patched in2.15.3
Update to 2.15.3 or newer.
You are affected if you run ≤ 2.15.2. Version 2.15.3 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.
What to do
- Update to version 2.15.3, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- 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 TANG Cheuk Hei (siunam).
The Contact Form by Bit Form: Multi Step Form, Calculation Contact Form, Payment Contact Form & Custom Contact Form builder plugin for WordPress is vulnerable to arbitrary file read in all versions up to, and including, 2.15.2 due to improper input validation within the iconUpload function. This makes it possible for authenticated attackers, with Administrator-level access and above, to leverage a PHP filter chain attack and read the contents of arbitrary files on the server, which can contain sensitive information.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder
All 28| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.5 | Authenticated (Administrator+) SQL Injection via 'filterText' Parameter ≤3.2.0Update to 3.2.1 | CVE-2026-16810 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting <3.1.4Update to 3.1.4 | CVE-2025-15669 | |
| Medium5.3 | Missing Authorization to Unauthenticated Unauthorized Form Submission <3.1.2Update to 3.1.2 | CVE-2026-15054 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤3.1.0Update to 3.2.0 | CVE-2026-16573 | |
| High7.1 | Authenticated (Subscriber+) Arbitrary File Deletion via '_old' Parameter ≤3.1.1Update to 3.1.2 | CVE-2026-14372 |
- Medium6.5Authenticated (Administrator+) SQL Injection via 'filterText' Parameter
≤3.2.0Update to 3.2.1
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting
<3.1.4Update to 3.1.4
- Medium5.3Missing Authorization to Unauthenticated Unauthorized Form Submission
<3.1.2Update to 3.1.2
- High7.2Unauthenticated Stored Cross-Site Scripting
≤3.1.0Update to 3.2.0
- High7.1Authenticated (Subscriber+) Arbitrary File Deletion via '_old' Parameter
≤3.1.1Update to 3.1.2
Timeline
CVE published
Severity medium, CVSS 4.9
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.