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CVE-2026-67364 – Pre-Auth PHP Code Injection (RCE) – Balbooa Forms for Joomla (com_baforms) 1.0.0–2.

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Summary

CVE-2026-67364 is a critical, pre-authentication PHP code injection vulnerability in the Balbooa Forms extension (com_baforms) for Joomla. Unauthenticated attackers can inject and execute arbitrary PHP code on the server by abusing the extension’s custom PHP handler feature, resulting in full remote code execution. The flaw carries a maximum severity rating of 10.0 (Critical).

Technical details

  • Root cause: Balbooa Forms allows site administrators to configure a custom PHP post-submission handler for a form, and this handler code is executed using eval().
  • The handler supports a [URL parameter = X] shortcode that is replaced with the raw, unescaped value of an attacker-controlled query parameter before being passed to eval().
  • The CSRF token normally required to reach the vulnerable endpoint is itself disclosed anonymously through a separate, unauthenticated task, providing effectively no protection.
  • Attack vector: network, no authentication or user interaction required; exploitation requires the target form to have a custom PHP handler configured that references the vulnerable shortcode, and to lack reCAPTCHA protection on submission.
  • Impact: full arbitrary PHP code execution in the context of the web server, enabling complete compromise of confidentiality, integrity, and availability of the affected system.

Affected software

  • Balbooa Forms extension for Joomla (com_baforms), versions 1.0.0 through 2.4.3.1

Severity

  • CVSS v4.0 Base Score: 10.0 (Critical)
  • Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Mitigation and recommended actions

  • Immediate: upgrade Balbooa Forms to version 2.4.3.2 or later, where the vulnerability is fixed.
  • If patching is not immediately possible: remove or disable any custom PHP post-submission handlers that reference the [URL parameter = X] shortcode, and enable reCAPTCHA on all form submit buttons to add a barrier to automated exploitation.
  • Review Joomla and web server access logs for suspicious requests containing PHP code or eval-style payloads in query parameters targeting Balbooa Forms submission endpoints.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /components/com_baforms/

References

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Map your entire attack surface (continously)

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Identify Potential External Exposures

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4

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Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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