CVE-2026-94504highobserved exploitationCWE-79

CVE-2026-94504: high-severity vulnerability in kstover Ninja Forms – Contact Form Builder…

Ninja Forms – The Contact Form Builder That Grows With You <= 3.15.3 - Stored Cross-Site Scripting

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63Vexday Risk Score

Prioritize patching. It exploitation observed in the wild and has a public proof of concept.

ssvc Actcvss 7.2epss 0.6%
from disclosure to weapon2 days
Published on NVDSep 22
1st PoC+2d
Observed exploitation+14d
Ninja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script runs in the WordPress admin origin.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
kstover · Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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