What’s Vulnerable › Vulnerabilities

CVE-2021-24164: Ninja Forms < 3.4.34.1 - Authenticated OAuth Connection Key Disclosure

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-05 · updated 2026-06-17
• Weakness: CWE-200

Description

In the Ninja Forms Contact Form WordPress plugin before 3.4.34.1, low-level users, such as subscribers, were able to trigger the action, wp_ajax_nf_oauth, and retrieve the connection url needed to establish a connection. They could also retrieve the client_id for an already established OAuth connection.

Affected products

• kstover Ninja Forms – The Contact Form Builder That Grows With You: before 3.4.34.1 — fixed in 3.4.34.1

How to fix

Upgrade to a fixed version: kstover Ninja Forms – The Contact Form Builder That Grows With You 3.4.34.1. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/dfa32afa-c6de-4237-a9f2-709843dcda89
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/
• https://wpscan.com/vulnerability/dfa32afa-c6de-4237-a9f2-709843dcda89
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/

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