What’s Vulnerable › Vulnerabilities

CVE-2021-24166: Ninja Forms < 3.4.34 - CSRF to OAuth Service Disconnection

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-05 · updated 2026-06-17
• Weakness: CWE-352

Description

The wp_ajax_nf_oauth_disconnect from the Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress WordPress plugin before 3.4.34 had no nonce protection making it possible for attackers to craft a request to disconnect a site's OAuth connection.

Affected products

• kstover Ninja Forms – The Contact Form Builder That Grows With You: before 3.4.34 — fixed in 3.4.34

How to fix

Upgrade to a fixed version: kstover Ninja Forms – The Contact Form Builder That Grows With You 3.4.34. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/b531fb65-a8ff-4150-a9a1-2a62a3c00bd6
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/
• https://wpscan.com/vulnerability/b531fb65-a8ff-4150-a9a1-2a62a3c00bd6
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/

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