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

CVE-2023-2440Userproplugin · Userpro

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 69% of all CVEs

Weaknesses (CWE)

CWE-352Cross-Site Request Forgery (CSRF)

Description

The UserPro plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 5.1.1. This is due to missing nonce validation in the 'admin_page', 'userpro_verify_user' and 'verifyUnverifyAllUsers' functions. This makes it possible for unauthenticated attackers to modify the role of verified users to elevate verified user privileges to that of any user such as 'administrator' via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Timeline

Published 2023-11-22

Modified 2026-04-08

External references

NVD MITRE Exploit-DB 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-2023-2440

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.