CVE-2021-39353: Easy Registration Forms <= 2.1.1 Cross-Site Request Forgery to Stored Cross-Site Scripting

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-19 · updated 2026-06-17
Weakness: CWE-352

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.

Affected products

easyregistrationforms Easy Registration Forms: through 2.1.1

References

https://plugins.trac.wordpress.org/browser/easy-registration-forms/tags/2.1.1/includes/class-form.php#L256
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39353
https://plugins.trac.wordpress.org/browser/easy-registration-forms/tags/2.1.1/includes/class-form.php#L256
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39353

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