The vulnerability identified as CVE-2025-15512 affects the Aplazo Payment Gateway plugin for WordPress, specifically all versions up to and including 1.4.2. The root cause is a missing authorization check (CWE-862) in the function check_success_response(), which is responsible for handling payment success responses. Due to this missing capability verification, unauthenticated attackers can invoke this function to alter the status of any WooCommerce order to 'pending payment'. This unauthorized modification does not require any user authentication or interaction, making it remotely exploitable over the network with low complexity. The impact is primarily on the integrity of order data, as attackers can disrupt the normal order lifecycle, potentially causing financial discrepancies, operational delays, or enabling fraudulent activities such as order manipulation or denial of service by forcing orders into a pending state indefinitely. The vulnerability has a CVSS v3.1 base score of 5.3, reflecting medium severity with network attack vector, no privileges required, and no user interaction needed. No patches or updates have been published at the time of disclosure, and there are no known active exploits in the wild. Organizations using this plugin in their WooCommerce setups should assess exposure and implement compensating controls until an official patch is available.

For European organizations, the vulnerability poses risks to e-commerce operations relying on WooCommerce with the Aplazo Payment Gateway plugin. Attackers can manipulate order statuses, causing financial reconciliation issues, customer dissatisfaction due to order delays, and potential revenue loss. The integrity of transaction data is compromised, which may affect accounting and audit processes. Additionally, attackers could leverage this flaw to create operational disruptions or facilitate fraud schemes by altering payment statuses without authorization. Given the widespread use of WordPress and WooCommerce in Europe, especially among small to medium enterprises, the threat could impact a broad range of sectors including retail, services, and digital goods. The absence of authentication and user interaction requirements increases the likelihood of exploitation, raising concerns for organizations with limited monitoring or incident response capabilities. While availability is not directly impacted, the operational disruption caused by order status manipulation can indirectly affect service continuity and customer trust.

Immediate mitigation steps include disabling or deactivating the Aplazo Payment Gateway plugin until a security patch is released. Organizations should monitor WooCommerce order statuses closely for unexpected changes to 'pending payment' and implement alerting mechanisms for anomalous order modifications. Restricting access to the WordPress REST API and admin endpoints through web application firewalls (WAF) or IP whitelisting can reduce exposure to unauthenticated requests exploiting this vulnerability. Applying strict role-based access controls and auditing plugin usage can help detect unauthorized activities. Additionally, organizations should maintain regular backups of e-commerce data to enable recovery from manipulation. Engaging with the plugin vendor for timely patch releases and subscribing to vulnerability advisories is critical. Finally, consider deploying runtime application self-protection (RASP) or endpoint detection and response (EDR) solutions that can identify and block suspicious plugin behavior.