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TI-2026-75158 Aliases CVE-2026-101335GHSA-j6gp-6943-4w67

Arbitrary shortcode execution in Forminator Forms for WordPress

Priority LOW 35CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

Forminator Forms for WordPress is affected in versions up to and including 1.58.1. Quiz notifications run do_shortcode() on User-Agent and referer_url values that keep square brackets, which is a code injection flaw (CWE-94). An unauthenticated remote attacker can submit a quiz whose notification template contains {quiz_result} to run shortcodes registered on the site. The impact depends on shortcodes from other installed plugins and themes and ranges from content injection to information disclosure.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 1.58.1. This is due to the forminator_replace_quiz_form_data() helper invoking do_shortcode() on the fully expanded notification body once the {quiz_result} merge tag has been substituted, while the earlier-substituted {user_agent} and {refer_url} merge tags carry unauthenticated attacker-controlled bytes (the User-Agent header and the referer_url POST parameter) through sanitize_text_field()/esc_html(), neither of which strip the '[' and ']' shortcode delimiters. This makes it possible for unauthenticated attackers to execute arbitrary WordPress shortcodes registered on the site by submitting a quiz whose notification template contains {quiz_result}; the resulting impact depends on the shortcodes exposed by other installed plugins/themes and can range from arbitrary content injection to information disclosure.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0028 20th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wpmudevForminator Forms – Contact Form, Payment Form & Custom Form Builderup to 1.58.1—No fix listedCNA
  • Forminator Forms – Contact Form, Payment Form & Custom Form Builder Vendorwpmudev Affected up to 1.58.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Forminator Forms (Contact Form, Payment Form & Custom Form Builder).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-101335
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-16 Alias added: GHSA-j6gp-6943-4w67

References

Other 7

  • TI-2023-04240 Forminator <= 1.24.6 - Unauthenticated Arbitrary File Upload CVSS 3.1CRITICAL 9.8
  • TI-2023-04683 Defender Security < 4.1.0 - Protection Bypass (Hidden Login Page) CVSS 3.1MEDIUM 5.3
  • TI-2026-13248 Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration CVSS 3.1CRITICAL 9.8
  • TI-2025-05864 Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.44.2… CVSS 3.1HIGH 8.8
  • TI-2024-20466 SQL injection in wpmudev Forminator CVSS 3.1HIGH 7.2
  • TI-2024-07873 Hustle < 7.8.5 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences