PatchSiren cyber security CVE debrief

CVE-2026-9278 Form Builder CP CVE debrief

CVE-2026-9278 is a Stored Cross-Site Scripting (XSS) vulnerability in the Form Builder CP WordPress plugin before version 1.2.47. The plugin does not properly sanitize a form configuration value before storing it and using it as part of a client-side script execution. This allows authenticated users with Editor-level access and above to perform Stored Cross-Site Scripting attacks against any visitor of a page rendering the affected form, even when the `unfiltered_html` capability is disallowed.

Vendor: Form Builder CP
Product: Form Builder CP
CVSS: Unknown
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-15
Original CVE updated: 2026-06-15
Advisory published: 2026-06-15
Advisory updated: 2026-06-15

Who should care

Users of the Form Builder CP WordPress plugin, particularly those with Editor-level access and above, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability exists in the Form Builder CP WordPress plugin before version 1.2.47. Authenticated users with Editor-level access and above can exploit this vulnerability to perform Stored Cross-Site Scripting attacks.

Defensive priority

High

Recommended defensive actions

Update the Form Builder CP WordPress plugin to version 1.2.47 or later.
Restrict Editor-level access and above to trusted users only.
Monitor for suspicious activity on pages rendering the affected form.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found at [ref-4].

Official resources

CVE-2026-9278 was published on 2026-06-15T08:16:22.200Z and has not been modified since then.