What is CVE-2021-4343?

CVE-2021-4343 is a critical-severity vulnerability in Stylemix Directory Listings WordPress Plugin – Ulisting, classified under Missing Authorization. CVSS score: 9.8/10. Published 2023-06-07.

How severe is CVE-2021-4343?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-4343 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Stylemix Directory Listings WordPress Plugin – Ulisting

CVE-2021-4343

The Unauthenticated Account Creation plugin for WordPress is vulnerable to Unauthenticated Account Creation in versions up to, and including, 1.6.6. This is due to the stm_listing_register AJAX action function being accessible and taking roles unprotected. This makes it possible for unauthenticated attackers to create accounts, even those with administrator privileges.

Vulnerability class: Broken Access Control

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: -0.000

Affected products

Stylemix Directory Listings WordPress Plugin – Ulisting — versions 0
Stylemixthemes Ulisting

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/threat-intel/vulnerabilities/id/1c6bf45b-b02d-43bb-b682-7f1ae… (Third Party Advisory)
blog.nintechnet.com/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabi… (Exploit)
plugins.trac.wordpress.org/changeset (Patch)

Frequently asked questions

What is CVE-2021-4343?: CVE-2021-4343 is a critical-severity vulnerability in Stylemix Directory Listings WordPress Plugin – Ulisting, classified under Missing Authorization. CVSS score: 9.8/10. Published 2023-06-07.
How severe is CVE-2021-4343?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-4343 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.