Information disclosure in WordPress - CVE-2023-5561
Published: October 16, 2023 / Updated: May 13, 2024
Vulnerability identifier: #VU82022
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-5561
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the "/wp-json/wp/v2/users" REST API endpoin. A remote attacker can disclose email addresses of WordPress users by probing them character by character.
Affected software
WordPress
Debian Linux
Fedora
wordpress
wordpress (Debian package)
Debian Linux
Fedora
wordpress
wordpress (Debian package)
How to mitigate CVE-2023-5561
Install updates from vendor's website.
WordPress - addressed in versions 4.7.27, 4.8.23, 4.9.24, 5.0.20, 5.1.17, 5.2.19, 5.3.16, 5.4.14, 5.5.13, 5.6.12, 5.7.10, 5.8.8, 5.9.8, 6.0.6, 6.1.4, 6.2.3, 6.3.2
wordpress - addressed in versions 5.1.17-1.el7, 6.2.3-1.fc37, 6.3.2-1.el9, 6.3.2-1.fc38, 6.3.2-1.fc39
wordpress (Debian package) - addressed in versions 5.7.11+dfsg1-0+deb11u1, 6.1.6+dfsg1-0+deb12u1
wordpress - addressed in versions 5.1.17-1.el7, 6.2.3-1.fc37, 6.3.2-1.el9, 6.3.2-1.fc38, 6.3.2-1.fc39
wordpress (Debian package) - addressed in versions 5.7.11+dfsg1-0+deb11u1, 6.1.6+dfsg1-0+deb12u1