# CVE-2026-120561: JetFormBuilder missing capability check in Update Options

Source: https://junglewise.ai/threats/cve-2026-120561-the-jetformbuilder-dynamic-blocks-form-builder-plugin-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-120561 · Severity: medium · CVSS 5.3 · Published 2026-11-03

JetFormBuilder is a WordPress plugin for building dynamic forms. The plugin fails to check user permissions on a function that modifies JetEngine settings, allowing unauthenticated attackers to alter form submission options if an administrator has configured a form with the Update Options action. This could result in unauthorized data modifications or configuration changes affecting how forms process submissions.

Technologies: [Crocoblock JetFormBuilder](https://junglewise.ai/threats/technologies/jetformbuilder). Vendors: [Crocoblock](https://junglewise.ai/threats/vendors/crocoblock).

## Quick answers

**Is CVE-2026-120561 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120561 being exploited in the wild.

**How severe is CVE-2026-120561?** Medium severity, with a CVSS score of 5.3, published 3 November 2026.

**Which products and versions are affected?** Crocoblock JetFormBuilder up to 3.6.2.

**Is there a fix for CVE-2026-120561?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-120561 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-120561?** Check whether you run Crocoblock JetFormBuilder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a missing capability check in the 'Update_Options' action class's 'do_action' function. Unauthenticated attackers can exploit this via the plugin's form submission mechanism to modify JetEngine Options Page values, provided JetEngine is installed and a form is configured with the Update Options post-submission action. The lack of authentication allows direct manipulation of stored options without proper authorization verification.

## Affected products

- Crocoblock JetFormBuilder up to 3.6.2

## Timeline

- 2026-11-03: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php](https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php)
- [https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php](https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php)

## Related threats

- [Crocoblock JetFormBuilder stored cross-site scripting](https://junglewise.ai/threats/cve-2026-123482-improper-neutralization-of-input-during-web-page-generation)
- [Crocoblock JetFormBuilder cross-site scripting vulnerability](https://junglewise.ai/threats/cve-2026-123484-improper-neutralization-of-input-during-web-page-generation)
- [Crocoblock JetFormBuilder content injection in form pages](https://junglewise.ai/threats/cve-2026-123860-improper-neutralization-of-script-related-html-tags-in-a-web)
- [Crocoblock JetFormBuilder stored XSS in form fields](https://junglewise.ai/threats/cve-2026-123483-improper-neutralization-of-script-related-html-tags-in-a-web)
- [JetFormBuilder Stored Cross-Site Scripting via form field mapping](https://junglewise.ai/threats/cve-2026-119183-the-jetformbuilder-dynamic-blocks-form-builder-plugin-for)