WordPress WP User Groups 2.0.0 Cross Site Request Forgery

Type packetstorm
Reporter Tom Adams
Modified 2018-05-12T00:00:00


Software: WP User Groups  
Version: 2.0.0  
Homepage: https://wordpress.org/plugins/wp-user-groups/  
Advisory report: https://advisories.dxw.com/advisories/csrf-wp-user-groups/  
CVE: Awaiting assignment  
CVSS: 4.3 (Medium; AV:N/AC:M/Au:N/C:N/I:P/A:N)  
CSRF in WP User Groups allows anybody to modify user groups and types  
WP User Groups creates new bulk actions to put users into (or remove them from) agroupsa and atypesa. A nonce is sent with the request, but it is not checked.  
Proof of concept  
Activate the plugin  
Make sure you have a user with user_id=1  
Visit http://localhost/wp-admin/edit-tags.php?taxonomy=user-group and create a group called aCata with slug acata  
Visit http://localhost/wp-admin/users.php?users%5B%5D=1&action2=add-cat-user-group  
If you go back to http://localhost/wp-admin/users.php youall see the user with user_id=1 is now in the group aCata  
Upgrade to version 2.1.1 or later.  
Disclosure policy  
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/  
Please contact us on security@dxw.com to acknowledge this report if you received it via a third party (for example, plugins@wordpress.org) as they generally cannot communicate with us on your behalf.  
This vulnerability will be published if we do not receive a response to this report with 14 days.  
2018-04-12: Discovered  
2018-04-16: Reported to plugin author via email  
2018-04-16: Vendor reported fixed in 2.1.1  
2018-05-11: Advisory published  
Discovered by dxw:  
Tom Adams  
Please visit security.dxw.com for more information.