MEDIUM
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php in the REST API implementation in WordPress 4.7 before 4.7.1 does not properly restrict listings of post authors, which allows remote attackers to obtain sensitive information via a wp-json/wp/v2/users request.
http://www.openwall.com/lists/oss-security/2017/01/14/6
http://www.securityfocus.com/bid/95391
http://www.securitytracker.com/id/1037591
https://codex.wordpress.org/Version_4.7.1
https://github.com/WordPress/WordPress/commit/daf358983cc1ce0c77bf6d2de2ebbb43df2add60
https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/
https://wpvulndb.com/vulnerabilities/8715
https://www.exploit-db.com/exploits/41497/
https://www.wordfence.com/blog/2016/12/wordfence-blocks-username-harvesting-via-new-rest-api-wp-4-7/
Source: MITRE
Published: 2017-01-15
Updated: 2017-09-01
Type: CWE-200
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Impact Score: 1.4
Exploitability Score: 3.9
Severity: MEDIUM