The Welcart e-Commerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.12.5 via the 'member[ID]' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to overwrite any existing Welcart shop-member account's email address and password by supplying that member's numeric ID, then authenticate as that member to achieve full account takeover. The only authentication barrier is a wp_verify_nonce() check against a nonce printed to every unauthenticated visitor on the auto-published New Enrollment Form, meaning no existing account, no WordPress login, and no non-default configuration is required to exploit this vulnerability.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
uscnanbu:welcart e-commerce
References 7
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/classes/usces…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/classes/usces…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/classes/usces…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/usc-e-shop/tags/2.12.5/classes/usces…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3760784/usc-e-shop
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3760784/usc-e-shop/trunk/classes/u…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/e93b0ebf-576d-48d0-95…
security@wordfence.com