XSS in Wpmudev Forminator Forms – Contact Form, Payment Form & Custom Builder
CVE-2026-18323
The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Radio Field (Save and Continue Draft) in all versions up to, and including, 1.57.0.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable because the Save-and-Continue draft submission AJAX endpoint is registered as nopriv, allowing unauthenticated attackers to bypass radio field option-membership validation and persist a crafted payload that, when rendered on the Submissions admin page, is auto-executed via the bundled Inputmask library's data-attribute callback binding.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/85b02779-d85f-4700-9994-68391…
- plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/admin/views/custom-fo…
- plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/library/modules/custo…
- plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/library/fields/radio…
- plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/library/abstracts/abs…
- plugins.trac.wordpress.org/browser/forminator/tags/1.56.0/library/helpers/helpe…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/admin/views/custom-fo…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/modules/custo…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/fields/radio…
- plugins.trac.wordpress.org/browser/forminator/tags/1.55.1/library/abstracts/abs…
Frequently asked questions
- What is CVE-2026-18323?
- CVE-2026-18323 is a high-severity vulnerability in Wpmudev Forminator Forms – Contact Form, Payment Form & Custom Builder, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-08-25.
- How severe is CVE-2026-18323?
- High severity. CVSS v3 base score is 7.2 out of 10.