Information disclosure in WordPress - CVE-2017-5487

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to incorrectly implemented restrictions within REST API ("wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php") when accessing listings of post authors via HTTP request to "wp-json/wp/v2/users" URL. A remote attacker can send a specially crafted HTTP request to vulnerable URL and obtain potentially sensitive data.

Successful exploitation of the vulnerability may allow an attacker to gain access to otherwise restricted sensitive information.

Affected software

How to mitigate CVE-2017-5487

Links to Public Exploits and PoC-codes

• Exploit #9040 - CVE-2017-5487-EXPLOIT (A PoC exploit for CVE-2017-5487 - WordPress User Enumeration.) (May 7, 2023)
• Exploit #2603 - wp-CVE-2017-5487-exploit (WordPress CVE-2017-5487 Exploit in Python) (April 27, 2020)
• Exploit #800 - WordPress < 4.7.1 - Username Enumeration (March 18, 2020)

External References

• https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/

Related Security Bulletins

• Multiple vulnerabilities in WordPress
• Arch Linux update for wordpress
• Information disclosure in WordPress WordPress