The Import and export users and customers plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 1.29.7. This is due to the 'save_extra_user_profile_fields' function not properly restricting which user meta keys can be updated via profile fields. The 'get_restricted_fields' method does not include sensitive meta keys such as 'wp_capabilities'.
This makes it possible for unauthenticated attackers to escalate their privileges to Administrator by submitting a crafted registration request that sets the 'wp_capabilities' meta key. The vulnerability can only be exploited if the "Show fields in profile" setting is enabled and a CSV with a wp_capabilities column header has been previously imported.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/import-users-from-csv-with-meta/tags…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3483330/import-users-from-csv-with…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/48dd9098-38e6-49da-8d…
security@wordfence.com