WordPress REST API Exposes User Emails via Unrestricted Search Fields
CVE-2023-5561 Published on October 16, 2023
WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure
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
Vulnerability Analysis
CVE-2023-5561 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Products Associated with CVE-2023-5561
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Affected Versions
WordPress:- Version 6.3.0 and below 6.3.2 is affected.
- Version 6.2.0 and below 6.2.3 is affected.
- Version 6.1.0 and below 6.1.4 is affected.
- Version 6.0.0 and below 6.0.6 is affected.
- Version 5.9.0 and below 5.9.8 is affected.
- Version 5.8.0 and below 5.8.8 is affected.
- Version 5.7.0 and below 5.7.10 is affected.
- Version 5.6.0 and below 5.6.12 is affected.
- Version 5.5.0 and below 5.5.13 is affected.
- Version 5.4.0 and below 5.4.14 is affected.
- Version 5.3.0 and below 5.3.16 is affected.
- Version 5.2.0 and below 5.2.19 is affected.
- Version 5.0.0 and below 5.0.20 is affected.
- Version 4.9.0 and below 4.9.24 is affected.
- Version 4.8.0 and below 4.8.23 is affected.
- Version 4.7.0 and below 4.7.27 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.