Ninja Forms submissions store script for administrative review
An unauthenticated visitor submits malicious field values through a public form. Unescaped output on the administrative submission-edit screen then executes script in the browser of the privileged user reviewing that submission. The export identifies version 3.15.3 but does not disclose the particular field, rendering function or exact edit URL. Authoritative affected range: 3.15.3 to < 3.15.4. Confirmed remediation: 3.15.4.
- Component
- Ninja Forms
- Plugin slug
ninja-forms- Affected
- 3.15.3 to < 3.15.4
- Safe version
3.15.4- Published
- Sep 22, 2026
This CVE was published Sep 22, 2026 and is one of 74 known issues for this plugin.
Update, patch or deactivate.
Update to the applicable fixed release identified in the authoritative export: 3.15.4. Update before reviewing untrusted submissions. Escape every stored field value for its final administrative output context and remove malicious historical entries; saving text safely does not replace output encoding.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Ninja Forms WordPress plugin 3.15.3 does not escape submitted form field values before outputting them on the submission edit screen in the admin area, which could allow unauthenticated users to submit values through a public form that then execute in the browser of any high-privileged user who reviews the submission.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H