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Vulnerability · Published Oct 16, 2023 · Assigned by WPScan

CVE-2023-5561WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure

Medium 5.3

In plain English

A medium-severity security flaw in WordPress from WordPress. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.3% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)4.3%top 8.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling2Nuclei, Public PoC

Official description

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

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12wordpress6.1.6+dfsg1-0+deb12u1DEBIAN-CVE-2023-5561
Debian:12wordpress6.1.6+dfsg1-0+deb12u1DSA-5685-1
Debian:13wordpress6.3.2+dfsg1-1DEBIAN-CVE-2023-5561
Debian:14wordpress6.3.2+dfsg1-1DEBIAN-CVE-2023-5561
Ubuntu:22.04:LTSwordpressno fix listedUBUNTU-CVE-2023-5561
Ubuntu:24.04:LTSwordpressno fix listedUBUNTU-CVE-2023-5561

Affected products (as reported)

VendorProductVersions
WordPress WordPress 6.3.0 – before 6.3.26.2.0 – before 6.2.36.1.0 – before 6.1.46.0.0 – before 6.0.65.9.0 – before 5.9.85.8.0 – before 5.8.85.7.0 – before 5.7.105.6.0 – before 5.6.12

References