CVE•Published 2023-06-07•Modified 2026-04-08•1 article on news•6 live references•NVD data

CVE-2021-4340Stylemixthemes · Ulisting

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 25% of all CVEs

Weaknesses (CWE)

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Description

The uListing plugin for WordPress is vulnerable to generic SQL Injection via the ‘listing_id’ parameter in versions up to, and including, 1.6.6 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Timeline

Published 2023-06-07

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-2021-4340

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

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

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

Shodan · product

product:"Stylemixthemes Ulisting"

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

Shodan · banner/body mention

http.html:"Ulisting"

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