CVE-2024-3866: medium-severity vulnerability in kstover Ninja Forms – The Contact Form Builder…
Ninja Forms Contact Form <= 3.8.15 - Reflected Self-Based Cross-Site Scripting via Referer
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.7epss 0.3%
The Ninja Forms Contact Form plugin for WordPress is vulnerable to Reflected Self-Based Cross-Site Scripting via the 'Referer' header in all versions up to, and including, 3.8.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation of this vulnerability requires "maintenance mode" for a targeted form to be enabled. However, there is no setting available to the attacker or even an administrator-level user to enable this mode. The mode is only enabled during a required update, which is a very short window of time. Additionally, because of the self-based nature of this vulnerability, attackers would have to rely on additional techniques to execute a supplied payload in the context of targeted user.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
kstover · Ninja Forms – The Contact Form Builder That Grows With YouRelated CVEs — kstover Ninja Forms – The Contact Form Builder…
In the same product, most dangerous first.
CVE-2026-11363MEDIUMNinja Forms <= 3.14.6 - Authenticated (Administrator+) PHP Object Injection via Form ImportEPSS 0.9%CVE-2024-0685MEDIUMNinja Forms Contact Form <= 3.7.1 - Unauthenticated Second Order SQL InjectionEPSS 0.8%CVE-2026-15663MEDIUMNinja Forms <= 3.14.9 - Authenticated (Administrator+) SQL Injection via Import File 'settings' KeyEPSS 0.5%CVE-2024-12238MEDIUMNinja Forms – The Contact Form Builder That Grows With You <= 3.8.22 - Authenticated (Subscriber+) Arbitrary Shortcode ExecutionEPSS 0.5%CVE-2026-1239HIGHNinja Forms <= 3.14.1 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via token/refresh REST EndpointEPSS 0.5%CVE-2025-11924HIGHNinja Forms – The Contact Form Builder That Grows With You <= 3.13.2 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Exposure via Unscoped Bearer TokenEPSS 0.4%