CVE•Published 2023-04-15•Modified 2026-04-08•1 article on news•6 live references•NVD data

CVE-2023-2027Zm_ajax_login_\&_register_project · Zm_ajax_login_\&_register

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 38% of all CVEs

Weaknesses (CWE)

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

Description

The ZM Ajax Login & Register plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.0.2. 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 username.

Timeline

Published 2023-04-15

Modified 2026-04-08

External references

NVD MITRE Exploit-DB 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-2023-2027

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/zm-ajax-login-\&-register/"

Matches any site loading the "zm-ajax-login-\&-register" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Zm Ajax Login \& Register Project Zm Ajax Login \& Register"

All exposed Zm Ajax Login \& Register Project Zm Ajax Login \& Register instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Zm Ajax Login \& Register"

HTTP body or banner mentions "Zm Ajax Login \& Register" — catches deploys Shodan didn't identify as a product.