This article is a part of our Vulnerability Database (back to index)
Cross-Site Request Forgery occurrences in Greencms
An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that allows attackers to delete a log file via the index.php?m=admin&c=data&a=clear URI. (2018-11-20, CVE-2018-19376)
An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that allows attackers to execute arbitrary PHP code via the content parameter to index.php?m=admin&c=media&a=fileconnect. (2018-06-01, CVE-2018-11670)
An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that can add an admin account via index.php?m=admin&c=access&a=adduserhandle. (2018-06-01, CVE-2018-11671)
Why Cross-Site Request Forgery can be dangerous
The absence of Anti-CSRF tokens may lead to a Cross-Site Request Forgery attack that can result in executing a specific application action as another logged in user, e.g. steal their account by changing their email and password or silently adding a new admin user account when executed from the administrator account.
The attacker may copy one of your web application forms, e.g. email/password change form.
The webpage will contain a form with the exact set of fields as the original application but with input values already provided and the submit button replaced with a Javascript code causing auto-submission. When the page is accessed the form will be immediately submitted and page contents replaced with a valid content or a redirect to your original application.
One of your application users who is already logged in can be then tricked to navigate to such malicious page e.g. by clicking a link in a phishing email, and the pre-populated form content will be submitted to your application like it would be submitted by your user.