CVE-2025-5398 Ninja Forms <= 3.10.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via CSTI

What is CVE-2025-5398?

CVE-2025-5398 is a medium-severity cross-site scripting vulnerability in Ninjaforms Ninja Forms, published on 27 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the use of a templating engine in all versions up to, and including, 3.10.2.1 due to insufficient output escaping on user data passed through the template. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Weakness: CWE-79

Which versions are affected by CVE-2025-5398?

It affects 1 product.

Products include Ninjaforms Ninja Forms.

How do I fix CVE-2025-5398?

No fix has been published for CVE-2025-5398 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-5398 being exploited?

There is no known exploitation of CVE-2025-5398 in the wild and no public exploit code.

Other vulnerabilities in Ninjaforms Ninja Forms

• CVE-2025-9083 Ninja-forms < 3.11.1 - Unauthenticated PHP Objection Critical 9.8
• CVE-2016-1209 Deserialization in n/a Critical 9.8
• CVE-2018-20981 Information disclosure in n/a Critical 9.1
• CVE-2024-25572 Cross-site request forgery in Ninja Forms High 8.8
• CVE-2021-24163 Ninja Forms < 3.4.34 - Authenticated SendWP Plugin Installation and Client Secret Key Disclosure High 8.8

All Ninjaforms Ninja Forms vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-j9v5-5vmj-2hwp.