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CVE-2026-65048

CRITICAL 9.3 CVSS 4.0
Published
July 21, 2026
Last modified
October 24, 2026
NVD status
Deferred
Reported by
disclosure@vulncheck.com
Weakness
CWE-79
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Description

Ninja Forms plugin for WordPress versions 3.10.4 through 3.14.9 contains an unauthenticated stored cross-site scripting vulnerability in the Repeatable Fieldset feature where parseSubmissionIndex() accepts arbitrary strings as submission indexes without numeric validation, and admin_form_element() interpolates the index directly into HTML without escaping. An unauthenticated attacker can submit a public form with a crafted repeater child key containing malicious script payloads, which execute in an administrator's browser when viewing submissions in the WordPress admin panel, enabling session-cookie theft, creation of administrator accounts, installation of malicious plugins, and arbitrary modification of site content.

Affected WordPress components

  • Ninja Forms – The Contact Form Builder That Grows With You Plugin · ninja-forms
    Confirmed match Active
    Version 3.14.9; From 3.10.4 (including) to 3.14.9 (excluding)
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Saturday Drive Ninja Forms — From 3.10.4 (including) to 3.14.9 (excluding)

References

  • wordpress.org https://wordpress.org/plugins/ninja-forms/
  • wordpress.org https://wordpress.org/plugins/ninja-forms/changelog/
  • www.vulncheck.com https://www.vulncheck.com/advisories/ninja-forms-unauthenticated-stored-cross-site-scripting-via-repeatable-fieldset-submission-index
  • nvd.nist.gov Official NVD record