CVE-2021-4339 json
uListing <= 1.6.6 - Unauthenticated Information Disclosure
published 3y ago modified 4mo ago also EUVD-2021-34166
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- stylemix Directory Listings WordPress plugin – uListing 1.7
Is CVE-2021-4339 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- blog.nintechnet.com https://blog.nintechnet.com/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabilities/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected products
- stylemix Directory Listings WordPress plugin – uListing
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
blog.nintechnet.com
/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabilities/
exploit
-
wordfence.com
/threat-intel/vulnerabilities/id/0a6615fd-7c37-45d9-a657-0ba00df840e5?source=cve
third-party-advisory
-
plugins.trac.wordpress.org
/changeset?sfp_email=&sfph_mail=&reponame=&old=2456786%40ulisting&new=2456786%40ulisting&sfp_email=&sfph_mail=
release-notes
Sources
- CVE List CVE-2021-4339
- NVD CVE-2021-4339
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.