What’s Vulnerable › Vulnerabilities

CVE-2021-4073: RegistrationMagic <= 5.0.1.7 Authentication Bypass

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-14 · updated 2026-06-17
• Weakness: CWE-287

Description

The RegistrationMagic WordPress plugin made it possible for unauthenticated users to log in as any site user, including administrators, if they knew a valid username on the site due to missing identity validation in the social login function social_login_using_email() of the plugin. This affects versions equal to, and less than, 5.0.1.7.

Affected products

• Metagauss RegistrationMagic: through 5.0.1.7

References

• https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php
• https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073
• https://plugins.trac.wordpress.org/changeset/2635173/custom-registration-form-builder-with-submission-manager/trunk/services/class_rm_user_services.php
• https://www.wordfence.com/blog/2021/12/authentication-bypass-vulnerability-patched-in-user-registration-plugin/
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-4073

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