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Vulnerabilities CVE-2026-65048

CVE-2026-65048

Critical
Open
TLP:CLEAR

Ninja Forms Unauthenticated Stored Cross-Site Scripting via Repeatable Fieldset Submission Index

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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.

Details

CVSS Score
9.3
EPSS Score
0.31%

23.8th percentile

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
Confidence
90%
Published
Jul 21, 2026
Last Modified
Jul 21, 2026
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