# JetFormBuilder — Dynamic Blocks Form Builder <= 3.6.8 - Unauthenticated Stored Cross-Site Scripting via Post Meta Values in Calculated Field and Repeater Formulas

- **ID:** WPSEC-2026-2722
- **Plugin:** JetFormBuilder — Dynamic Blocks Form Builder (`jetformbuilder`), https://wordpress.org/plugins/jetformbuilder/
- **Affected versions:** all versions before 3.6.8.1
- **Fixed in:** 3.6.8.1 (Update to 3.6.8.1 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-11-07)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/jetformbuilder
- **Fix released:** 2026-11-06
- **Published:** 2026-11-07
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2722/

## Description

The JetFormBuilder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post meta macros (%META::key%) in Calculated field and Repeater field formulas in all versions up to, and including, 3.6.8, due to post meta values being inserted raw into the formula, which the browser evaluates as JavaScript. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever a user views the page containing the form. This only works on sites where a form writes visitor-supplied values into post meta (for example through an Insert Post action) and a formula on that post's form references the meta key.

## References

- https://wpsec.com/vuln/WPSEC-2026-2722/
- https://plugins.svn.wordpress.org/jetformbuilder/tags/3.6.8.1/
- https://wordpress.org/plugins/jetformbuilder/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2722/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.