[ WordPress ] Controlled Admin Access WordPress Plugin v1.4.0 - Improper Access Control

/*!
- # VULNERABILITY: Controlled Admin Access WordPress Plugin 1.4.0 - Improper Access Control & Privilege Escalation
- # GOOGLE DORK: inurl:/wp-content/plugins/controlled-admin-access/
- # DATE: 2021-03-18
- # SECURITY RESEARCHER: m0ze [ https://m0ze.ru ]
- # VENDOR: WPRuby [ https://wpruby.com ]
- # SOFTWARE VERSION: 1.4.0
- # SOFTWARE LINK: https://wordpress.org/plugins/controlled-admin-access/
- # CVSS: AV:N/AC:L/PR:L/UI:N/S:U
- # CWE: CWE-284
- # CVE: N/A
*/

### -- [ Info: ]

[i] An Improper Access Control vulnerability was discovered in the Controlled Admin Access plugin through 1.4.0 for WordPress.

[i] Uncontrolled access to the website customization functionality and global CMS settings, like /wp-admin/customization.php and /wp-admin/options.php, can lead to a complete compromise of the target resource.

[i] Even with the maximum restrictions for a temporary administrator account, several attack vectors are possible against the targeted website, the simplest and fastest is raising system privileges to the administrator level (w/o restrictions) and taking full control of the attacked website.

### -- [ Impact: ]

[~] Full compromise of the vulnerable web application and also web server.

### -- [ PoC #1 | Improper Access Control | Customize: ]

[!] https://example.com/wp-admin/customize.php

### -- [ PoC #2 | Improper Access Control | All Settings: ]

[!] https://example.com/wp-admin/options.php