# CVE-2026-12793: JetFormBuilder privilege escalation in form schema parsing

Source: https://junglewise.ai/threats/cve-2026-12793-jetformbuilder-privilege-escalation-in-form-schema-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-16. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-12793 · Severity: critical · CVSS 9.8 · Published 2026-09-16

JetFormBuilder is a WordPress plugin that allows users to create dynamic forms. An unauthenticated attacker can exploit a flaw in how the plugin processes form submissions to create a new administrator-level user account without proper authorization. This allows attackers to gain complete control of WordPress sites running vulnerable versions.

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

## Quick answers

**Is CVE-2026-12793 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12793 being exploited in the wild.

**How severe is CVE-2026-12793?** Critical severity, with a CVSS score of 9.8, published 16 September 2026.

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

**Is there a fix for CVE-2026-12793?** 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-2026-12793 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-12793?** 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 privilege escalation flaw in JetFormBuilder versions up to and including 3.6.2. The plugin fails to validate that a submitted form ID actually belongs to a JetFormBuilder form before parsing the referenced post's content as form schema and executing an Advanced Validation server-side callback. An unauthenticated attacker can exploit this by submitting a malicious form request that leverages the unvalidated form ID to trigger arbitrary form schema parsing and callback execution. This allows the attacker to create an administrator-level user account without authentication. The vulnerability is network-accessible and requires no user interaction beyond a single attacker-controlled request.

## Affected products

- Crocoblock JetFormBuilder up to and including 3.6.2

## Timeline

- 2026-09-16: disclosed

## References

- [https://plugins.trac.wordpress.org/changeset/3575346/jetformbuilder](https://plugins.trac.wordpress.org/changeset/3575346/jetformbuilder)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/a61b2ecc-d4e1-4e71-9187-ddc3d3616a29?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/a61b2ecc-d4e1-4e71-9187-ddc3d3616a29?source=cve)

## 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)