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CVE-2026-92229 – Unauthenticated Arbitrary Shortcode Execution (RCE-class) – Forminator Forms ≤ 1.57

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Summary

CVE-2026-92229 is a critical code injection vulnerability in the Forminator Forms plugin for WordPress (developed by WPMU DEV), affecting all versions up to and including 1.57.2. The flaw allows unauthenticated attackers to execute arbitrary WordPress shortcodes on a vulnerable site via the current_url parameter, without requiring any credentials or user interaction. It carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: Forminator fails to properly validate the current_url parameter before passing its value into WordPress’s do_shortcode() function, resulting in improper control of code generation (CWE-94).
  • Trigger conditions: An attacker sends a crafted request containing a manipulated current_url value to a Forminator-enabled endpoint; no authentication or prior interaction from a victim is needed.
  • Attack vector: Network — the vulnerable functionality is reachable remotely over HTTP/HTTPS with low attack complexity and no privileges required.
  • Impact: Arbitrary shortcode execution can be leveraged to trigger sensitive plugin/theme functionality on the site (the CVSS vector indicates a high confidentiality impact with no direct integrity or availability impact), and depending on which shortcodes are registered on the target site, this can be chained into further compromise.

Affected software

  • Forminator Forms – Contact Form, Payment Form & Custom Form Builder (WordPress plugin by WPMU DEV): all versions through 1.57.2.

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Forminator Forms to version 1.57.3 or later, which contains the fix for this vulnerability.
  • If immediate patching is not possible: Restrict or disable public access to Forminator form-rendering endpoints where feasible, monitor web server/WAF logs for requests manipulating a current_url parameter, and consider temporarily deactivating the plugin until it can be updated.

References

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