Arbitrary Shortcode Execution Vulnerability in Forminator Forms Plugin for WordPress
CVE-2026-103911

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Vendor
CVE Published:
16 October 2026

What is CVE-2026-103911?

The Forminator Forms plugin for WordPress is susceptible to arbitrary shortcode execution across all versions up to and including 1.58.1. This vulnerability arises from inadequate validation of user inputs, specifically when executing the do_shortcode function. An unauthenticated attacker can exploit this flaw by sending a GET request to the search results page or by submitting anonymous comments on posts, which could lead to the execution of unauthorized shortcodes. Notably, this vulnerability does not require specific Forminator content or configurations to trigger, making it a significant threat to sites utilizing this plugin.

Affected Version(s)

Forminator Forms – Contact Form, Payment Form & Custom Form Builder 0 <= 1.58.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/forminator/tag...
https://plugins.trac.wordpress.org/browser/forminator/tag...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jakub Herman
.