What’s Vulnerable › Vulnerabilities

CVE-2021-24165: Ninja Forms < 3.4.34 - Administrator Open Redirect

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-05 · updated 2026-06-17
• Weakness: CWE-601

Description

In the Ninja Forms Contact Form WordPress plugin before 3.4.34, the wp_ajax_nf_oauth_connect AJAX action was vulnerable to open redirect due to the use of a user supplied redirect parameter and no protection in place.

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/6147acf5-e43f-47e6-ab56-c9c8be584818
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/
• https://wpscan.com/vulnerability/6147acf5-e43f-47e6-ab56-c9c8be584818
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/

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