What is the CVSS score of CVE-2025-5398?

CVE-2025-5398 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of PHP are affected by CVE-2025-5398?

Organizations using Ninja Forms - The Contact Form Builder That Grows With You should be aware of moderate risk from CVE-2025-5398, a cross-site scripting vulnerability rated CVSS 6.4.. A patch is available.

How to fix or mitigate CVE-2025-5398?

Within 30 days: Identify affected systems running for WordPress is vulnerable to Stored Cross-Site Scripting v and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

PHP CVE-2025-5398

EUVD-2025-28541 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-06-27 security@wordfence.com

PHP WordPress XSS Ninja Forms

6.4

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 16, 2026 - 00:16 euvd

EUVD-2025-28541

Analysis Generated

Mar 16, 2026 - 00:16 vuln.today

Patch released

Mar 16, 2026 - 00:16 nvd

Patch available

CVE Published

Jun 27, 2025 - 10:15 nvd

MEDIUM 6.4

DescriptionNVD

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.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

A vendor patch is available — apply it immediately. Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

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CVE-2025-5398 vulnerability details – vuln.today

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