Before version 4.8.2, WordPress allowed a Directory Traversal attack in the Customizer component via a crafted theme filename.
https://wpvulndb.com/vulnerabilities/8912
http://www.securityfocus.com/bid/100912
https://www.debian.org/security/2017/dsa-3997
https://wordpress.org/news/2017/09/wordpress-4-8-2-security-and-maintenance-release/
https://core.trac.wordpress.org/changeset/41397
http://www.securitytracker.com/id/1039553
Source: Mitre, NVD
Published: 2017-09-23
Updated: 2025-04-20
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: High
EPSS: 0.30547