How severe is CVE-2021-39353?

CVE-2021-39353 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39353?

CVE-2021-39353 affects Easyregistrationforms Easy Registration Forms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39353 published?

CVE-2021-39353 was published on 2021-11-19 and last updated on 2026-06-17.

CVE-2021-39353

CVE-2021-39353 is a high-severity vulnerability in Easyregistrationforms Easy Registration Forms with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Easyregistrationforms Easy Registration Forms
Published: 2021-11-19
Last modified: 2026-06-17

Description

The Easy Registration Forms WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation via the ajax_add_form function found in the ~/includes/class-form.php file which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 2.1.1.

Frequently asked questions

What is CVE-2021-39353?: The Easy Registration Forms WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation via the ajax_add_form function found in the ~/includes/class-form.php file which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 2.1.1.
How severe is CVE-2021-39353?: CVE-2021-39353 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-39353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39353?: CVE-2021-39353 affects Easyregistrationforms Easy Registration Forms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39353 published?: CVE-2021-39353 was published on 2021-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:easyregistrationforms:easy_registration_forms:*:*:*:*:*:wordpress:*:*

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