How severe is CVE-2021-24165?

CVE-2021-24165 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24165 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24165?

CVE-2021-24165 affects Ninjaforms Ninja Forms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24165?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-24165 published?

CVE-2021-24165 was published on 2021-04-05 and last updated on 2026-06-17.

CVE-2021-24165

CVE-2021-24165 is a medium-severity vulnerability in Ninjaforms Ninja Forms with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Ninjaforms Ninja Forms
Published: 2021-04-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-24165?: 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.
How severe is CVE-2021-24165?: CVE-2021-24165 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24165 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24165?: CVE-2021-24165 affects Ninjaforms Ninja Forms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24165?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24165 published?: CVE-2021-24165 was published on 2021-04-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ninjaforms:ninja_forms:*:*:*:*:*:wordpress:*:*

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Other CWE-601 (Open Redirect) vulnerabilities

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