CVE-2025-13157 is an authorization bypass vulnerability categorized under CWE-639 (Authorization Bypass Through User-Controlled Key) found in the QODE Wishlist for WooCommerce plugin for WordPress. The vulnerability exists in all versions up to and including 1.2.7 due to insufficient validation of a user-controlled key parameter within the 'qode_wishlist_for_woocommerce_wishlist_table_item_callback' function. This function handles requests related to wishlist items, but it fails to verify whether the requester is authorized to update the targeted wishlist. As a result, an unauthenticated attacker can manipulate the public view of any wishlist by crafting requests with arbitrary keys, effectively performing an Insecure Direct Object Reference (IDOR) attack. The vulnerability has a CVSS v3.1 base score of 5.3, reflecting medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact is limited to integrity, as attackers can alter wishlist data but cannot access confidential information or disrupt availability. No patches or exploit code are currently publicly available, but the vulnerability's presence in a widely used e-commerce plugin makes it a notable risk. Organizations using this plugin should assess their exposure and apply mitigations promptly.

For European organizations, the primary impact of this vulnerability lies in the potential unauthorized modification of customer wishlists on e-commerce sites using the affected plugin. While it does not expose sensitive data or cause service outages, the integrity compromise can lead to customer dissatisfaction, loss of trust, and potential reputational damage. Attackers could manipulate wishlists to mislead customers, disrupt marketing campaigns, or interfere with sales analytics. This could indirectly affect revenue and customer retention. Given WooCommerce's popularity in Europe, especially among small and medium-sized enterprises, the vulnerability could be exploited at scale if left unaddressed. Additionally, regulatory considerations such as GDPR emphasize data integrity and security, so organizations failing to mitigate this vulnerability might face compliance risks if customer data integrity is compromised.

Specific mitigation steps include: 1) Immediately update the QODE Wishlist for WooCommerce plugin to a patched version once available from the vendor. Since no patch links are currently provided, monitor vendor announcements closely. 2) Implement web application firewall (WAF) rules to detect and block suspicious requests targeting the wishlist callback function, particularly those with unusual or malformed key parameters. 3) Restrict access to wishlist modification endpoints by enforcing authentication and authorization checks at the application or server level as a temporary workaround. 4) Conduct thorough code reviews and penetration testing on custom or third-party WooCommerce plugins to identify similar authorization weaknesses. 5) Educate development and security teams about IDOR risks and secure coding practices to prevent recurrence. 6) Monitor logs for anomalous activity related to wishlist modifications to detect potential exploitation attempts early.