# CVE-2026-19220: Forminator Forms privilege escalation in user registration

Source: https://junglewise.ai/threats/cve-2026-19220-forminator-forms-privilege-escalation-in-user-registration  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-26. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19220 · Severity: low · CVSS 3.7 · Published 2026-08-26

The Forminator Forms WordPress plugin allows unauthenticated visitors to create new sites on a WordPress multisite network and become administrators of those sites, even when the network explicitly prohibits site creation. An attacker can use the plugin's registration form to bypass network restrictions, register a new site, and gain full administrative control, potentially compromising the entire site.

## Quick answers

**Is CVE-2026-19220 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19220 being exploited in the wild.

**How severe is CVE-2026-19220?** Low severity, with a CVSS score of 3.7, published 26 August 2026.

**Which products and versions are affected?** Forminator Forminator Forms before 1.57.1.

**Is there a fix for CVE-2026-19220?** A patch was published on 2026-08-26: Version 1.57.1 and later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-19220 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-19220?** Check whether anything you run is named in the advisory. 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 an authorization bypass (CWE-269) in the Forminator Forms plugin's user registration functionality. The plugin fails to verify that multisite network settings allow site creation before processing a signup request. An unauthenticated attacker can submit a registration form via the forminator_submit_form_custom-forms AJAX action, which creates a site signup even when the network is configured to forbid site registration. After email activation, the attacker gains administrator access to the newly created site. The flaw affects versions before 1.57.1 and has been patched in 1.57.1 and later.

## Affected products

- Forminator Forminator Forms before 1.57.1

## Timeline

- 2026-08-24: disclosed
- 2026-08-26: patched: Version 1.57.1 and later

## References

- [https://wpscan.com/vulnerability/99e2a045-15cb-4c58-8090-1f92474f6485/](https://wpscan.com/vulnerability/99e2a045-15cb-4c58-8090-1f92474f6485/)