CVE-2023-2437

CRITICAL EXPLOITED NUCLEI

UserPro < 5.1.1 - Unauthenticated Authentication Bypass via Facebook Login

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2023-2437 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 1 public exploit from researchers including RxRCoder. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a functional Python exploit for CVE-2023-2437, an authentication bypass vulnerability in UserPro WordPress plugin <= 5.1.1. The exploit automates the process of identifying vulnerable sites, extracting admin usernames, and creating new administrator accounts.

Description

The UserPro plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 5.1.1. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email. An attacker can leverage CVE-2023-2448 and CVE-2023-2446 to get the user's email address to successfully exploit this vulnerability.

Exploits (1)

nomisec WORKING POC
by RxRCoder · remote
https://github.com/RxRCoder/CVE-2023-2437

This repository contains a functional Python exploit for CVE-2023-2437, an authentication bypass vulnerability in UserPro WordPress plugin <= 5.1.1. The exploit automates the process of identifying vulnerable sites, extracting admin usernames, and creating new administrator accounts.

Classification
Working Poc 90%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: UserPro WordPress plugin <= 5.1.1
No auth needed
Prerequisites: Target site running vulnerable UserPro plugin · WordPress REST API accessible
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Nuclei Templates (1)

UserPro <= 5.1.1 - Authentication Bypass
CRITICALVERIFIEDby intelligent-ears
FOFA: body="/wp-content/plugins/userpro/"

Scores

CVSS v3 9.8
EPSS 0.0680
EPSS Percentile 93.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

VulnCheck KEV 2023-11-22
CWE
CWE-287 CWE-288
Status published
Products (2)
None/UserPro - Community and User Profile WordPress Plugin < 5.1.1
userproplugin/userpro < 5.1.1
Published Nov 22, 2023
Tracked Since Feb 18, 2026