CVE-2023-5530: Ninja Forms < 3.6.34 - Admin+ Stored XSS

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-11-06 · updated 2026-06-17
Weakness: CWE-79

Description

The Ninja Forms Contact Form WordPress plugin before 3.6.34 does not sanitize and escape its label fields, which could allow high privilege users such as admin to perform Stored XSS attacks. Only users with the unfiltered_html capability can perform this, and such users are already allowed to use JS in posts/comments etc however the vendor acknowledged and fixed the issue

Affected products

kstover Ninja Forms – The Contact Form Builder That Grows With You: before 3.6.34 — fixed in 3.6.34

How to fix

Upgrade to a fixed version: kstover Ninja Forms – The Contact Form Builder That Grows With You 3.6.34. Check the vendor advisory for mitigations.

References

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