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Tool Directory

CVE-2023-5561

MediumPublished

WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure

Published: Oct 16, 2023
Updated: Apr 23, 2025
Assigning CNA: WPScan
Evidence observed: Aug 8, 2026

Primary CVSS

5.3/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS probability estimate

3.9%

Low · next 30 days

Percentile: 89.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack

Sources

CVE-2023-5561-POC-UpdatedPoC
Updated POC for Unauth Post Author Email Disclosures WordPress CVE-2023-5561
CVE-2023-5561-PoCPoC
PoC exploit for CVE-2023-5561 that enumerates WordPress user email addresses via the /wp-json/wp/v2/users API endpoint. For authorized security testing and education.
CVE-2023-5561-PoCPoC
WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack

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