CVE-2000-0106 is a high-severity vulnerability affecting the EasyCart shopping cart application, identified in early 2000. The vulnerability arises because EasyCart relies on hidden form fields to store sensitive purchase information, such as pricing, quantities, or product details, which can be manipulated by remote attackers. Since these hidden fields are client-side and not properly validated or protected on the server side, an attacker can modify them before submission, thereby altering purchase data such as prices or quantities. This can lead to unauthorized discounts, fraudulent orders, or disruption of transaction integrity. The vulnerability requires no authentication and can be exploited remotely over the network, making it relatively easy to exploit. The CVSS score of 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P) reflects the fact that the attack vector is network-based, with low attack complexity, no authentication required, and impacts confidentiality, integrity, and availability. Although no patch is available, the vulnerability stems from insecure design and lack of server-side validation of client-supplied data. No known exploits have been reported in the wild, but the risk remains significant for any organization still using EasyCart or legacy systems derived from it. Given the age of the vulnerability and the lack of patching, organizations relying on EasyCart should consider mitigation or migration strategies to prevent exploitation.

For European organizations, the impact of this vulnerability can be substantial if EasyCart is used for e-commerce operations. Attackers could manipulate purchase information to reduce prices or alter order details, leading to financial losses and revenue leakage. Additionally, the integrity of transaction data would be compromised, potentially undermining customer trust and exposing organizations to legal and compliance risks, especially under GDPR if customer data is mishandled or transactions are falsified. Availability impacts could arise if attackers exploit the vulnerability to disrupt order processing or cause denial of service by submitting malformed or excessive requests. The vulnerability's ease of exploitation and lack of authentication requirements increase the risk of widespread abuse. Organizations in sectors with high e-commerce activity, such as retail, travel, or digital services, are particularly vulnerable. Furthermore, reputational damage and potential regulatory scrutiny could follow if fraudulent transactions are not detected promptly.

Since no official patch is available, European organizations should implement several specific mitigations: 1) Enforce strict server-side validation of all purchase-related data, ignoring or overriding any client-supplied hidden form fields. 2) Implement cryptographic integrity checks such as HMACs or digital signatures on form data to detect tampering before processing orders. 3) Employ web application firewalls (WAFs) with custom rules to detect and block anomalous modifications to purchase parameters. 4) Monitor transaction logs for unusual patterns, such as sudden price changes or abnormal order quantities, to identify potential exploitation attempts. 5) Consider migrating away from EasyCart to modern, actively maintained e-commerce platforms that follow secure coding practices. 6) Educate developers and administrators about the risks of relying on client-side controls for sensitive data and the importance of server-side enforcement. 7) If migration is not immediately feasible, isolate the EasyCart application behind network segmentation and restrict access to trusted users and IP ranges to reduce exposure.