This vulnerability, identified as CWE-639 (Authorization Bypass Through User-Controlled Key), affects Simple Shopping Cart versions up to 5.2.9. It allows unauthenticated attackers to exploit insecure direct object references, bypassing authorization mechanisms by controlling key parameters. The CVSS 3.1 base score is 7.5, indicating a high impact on confidentiality with no impact on integrity or availability. No official patch or remediation guidance is currently available, and no known exploits are reported in the wild.

Successful exploitation of this vulnerability can result in unauthorized disclosure of sensitive information due to bypass of authorization controls. The attacker does not require authentication to access data, which poses a significant confidentiality risk. There is no impact on data integrity or system availability reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to the affected application where possible and monitor for suspicious activity related to unauthorized data access attempts.