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CVE-2026-67282 – Unauthenticated RCE – Fabrik Joomla Extension (1.0.0 – 4.6.7)

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Summary

CVE-2026-67282 is a critical unauthenticated remote code execution vulnerability in the Fabrik extension for Joomla, caused by improper control of code generation (CWE-94) in the frontend listfilter model. An attacker with no authentication or user interaction can execute arbitrary code on the underlying server, resulting in complete compromise of confidentiality, integrity, and availability.

Technical details

  • Root cause: The frontend listfilter model in Fabrik fails to properly sanitize or restrict user-supplied input before it is used in code generation/execution, classified as CWE-94 (Improper Control of Generation of Code).
  • Trigger conditions: No authentication or prior user interaction is required; the vulnerable functionality is reachable via the public-facing frontend of a Joomla site running Fabrik.
  • Attack vector: Network-based (AV:N), low attack complexity, no privileges required, no user interaction.
  • Impact: Full remote code execution on the host, leading to complete loss of confidentiality, integrity, and availability of the affected system.

Affected software

  • Fabrik extension for Joomla (fabrikar.com), versions 1.0.0 through 4.6.7

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 Fabrik to version 4.6.8 or later, where the listfilter code injection issue is fixed.
  • If patching is not immediately possible: Restrict or disable public-facing access to Fabrik’s frontend listfilter functionality, place the site behind a WAF capable of blocking code-injection payloads, and monitor web server logs for anomalous requests targeting Fabrik components until the patch can be applied.

References

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