CVE-2024-9507

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

2024-10-10 19:11
TANG Cheuk Hei (siunam)

Strategic Overview

Status
Patched in 2.15.3
Affected Plugin
Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder
Affected Version
<= 2.15.2
CVSS
4.9Medium
Weakness type
CWE-20 · Improper Input Validation
CVE
CVE-2024-9507
View all Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder vulnerabilities

At a glance

CVE-2024-9507 is a medium-severity Improper Input Validation vulnerability in the Bit Form WordPress plugin, affecting versions <= 2.15.2. It carries a CVSS score of 4.9 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Administrator level or above. The issue is fixed in version 2.15.3; sites on affected versions should update now. Disclosed October 2024, reported by TANG Cheuk Hei (siunam).

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-20: Improper Input Validation

Reaching this weakness in Bit Form <= 2.15.2 takes an account at Administrator level or above. Improper input validation means the application accepts input without confirming it has the form, type or range the code downstream assumes.

The concrete impact depends on where the unvalidated value lands, which is why records in this class range from cosmetic bugs to full compromise. For Bit Form the fix is 2.15.3: builds <= 2.15.2 are affected, anything from 2.15.3 onward is not.

Remediation

Update to version 2.15.3, or a newer patched version

How does WordSec protect against this?

An attacker needs Administrator access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Bit Form 2.15.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-9507https://www.wordfence.com/threat-intel/vulnerabilities/id/aa46842f-ed07-4f72-aedb-aa27baecd79chttps://nvd.nist.gov/vuln/detail/CVE-2024-9507

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C