# CVE-2026-92212: JetFormBuilder reflected XSS via URL query variable in calculated field

Source: https://junglewise.ai/threats/cve-2026-92212-the-jetformbuilder-dynamic-blocks-form-builder-plugin-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92212 · Severity: medium · CVSS 6.1 · Published 2026-09-25

JetFormBuilder is a WordPress plugin that allows users to create forms with dynamic fields. The plugin fails to properly sanitize user input from URL parameters when those parameters are used in calculated fields, allowing attackers to inject malicious scripts that execute in the browsers of users who click a specially crafted link. This can lead to account compromise, credential theft, or malware distribution.

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

## Quick answers

**Is CVE-2026-92212 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92212 being exploited in the wild.

**How severe is CVE-2026-92212?** Medium severity, with a CVSS score of 6.1, published 25 September 2026.

**Which products and versions are affected?** Crocoblock JetFormBuilder up to and including 3.6.5.3.

**Is there a fix for CVE-2026-92212?** 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-2026-92212 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-92212?** 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

Reflected XSS vulnerability in JetFormBuilder's calculated field component due to insufficient input sanitization and output escaping of URL query variables. An unauthenticated attacker can inject arbitrary JavaScript by crafting a malicious URL containing an XSS payload in the 'jfb_xss' parameter, which is executed when a page with a form containing a URL Query Variable preset field and a Calculated Field referencing that variable is loaded. The vulnerability requires specific form configuration but no authentication or user action beyond clicking a link.

## Affected products

- Crocoblock JetFormBuilder up to and including 3.6.5.3

## Timeline

- 2026-09-25: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.5.3/assets/build/frontend/main.js](https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.5.3/assets/build/frontend/main.js)
- [https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.5.3/includes/blocks/render/calculated-field-render.php](https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.6.5.3/includes/blocks/render/calculated-field-render.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)