Balbooa Forms Extension up to 2.4.3.1 Custom-PHP Post-Submission eval code injection

Summaryinfo

A vulnerability has been found in Balbooa Forms Extension up to 2.4.3.1 and classified as critical. The affected element is the function eval of the component Custom-PHP Post-Submission Handler. This manipulation causes code injection. This vulnerability is registered as CVE-2026-67364. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Balbooa Forms Extension up to 2.4.3.1 and classified as critical. Affected by this vulnerability is the function eval of the component Custom-PHP Post-Submission Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Joomla Extension - balbooa.com - Pre-auth PHP Code Injection in Balbooa Forms < 2.4.3.2 - CWE-94 / CWE-95 | CVSS 3.1: 9.8 Critical (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) The form's optional custom-PHP post-submission handler is executed via eval(). The [URL parameter = X] shortcode is substituted with the raw, unescaped value of a query parameter, letting an unauthenticated attacker inject arbitrary PHP that executes server-side. The CSRF token needed to reach the endpoint is itself disclosed anonymously via a separate task, so it provides no real protection. Exploitability requires the form to have a custom-PHP handler configured (a documented builder feature) referencing that shortcode, and no reCAPTCHA on the submit button.

This vulnerability is known as CVE-2026-67364 since 07/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/19/2026). MITRE ATT&CK project uses the attack technique T1059 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Balbooa

Name

• Forms Extension

Version

• 2.4.3.0
• 2.4.3.1

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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