What’s Vulnerable › Vulnerabilities

CVE-2021-4339: uListing <= 1.6.6 - Unauthenticated Information Disclosure

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-07 · updated 2026-06-17
• Weakness: CWE-862

Description

The uListing plugin for WordPress is vulnerable to authorization bypass due to a missing capability check in the "ulisting/includes/route.php" file on the /1/api/ulisting-user/search REST-API route in versions up to, and including, 1.6.6. This makes it possible for unauthenticated attackers to retrieve the list of all users and their email address in the database.

Affected products

• Stylemix uListing: through 1.6.6

References

• https://blog.nintechnet.com/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabilities/
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2456786%40ulisting&new=2456786%40ulisting&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/0a6615fd-7c37-45d9-a657-0ba00df840e5?source=cve
• https://blog.nintechnet.com/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabilities/
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2456786%40ulisting&new=2456786%40ulisting&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/0a6615fd-7c37-45d9-a657-0ba00df840e5?source=cve

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