CVE•Published 2023-11-22•Modified 2026-04-08•1 article on news•5 live references•NVD data

CVE-2023-2437Userproplugin · Userpro

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 1% of all CVEs

Weaknesses (CWE)

CWE-288Authentication Bypass Using an Alternate Path or Channel CWE-287Improper Authentication

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.

Timeline

Published 2023-11-22

Modified 2026-04-08

External references

NVD MITRE GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2023-2437

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/userpro/"

Matches any site loading the "userpro" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Userproplugin Userpro"

All exposed Userproplugin Userpro instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Userpro"

HTTP body or banner mentions "Userpro" — catches deploys Shodan didn't identify as a product.