CVE-2025-63015 identifies a missing authorization vulnerability in the Paysera WooCommerce Payment Gateway plugin, versions up to and including 3.9.0. The issue arises from incorrectly configured access control security levels, allowing users with low privileges to exploit the plugin’s functionality without proper authorization checks. This vulnerability is classified as a medium severity issue with a CVSS 3.1 base score of 4.3, reflecting its limited impact on confidentiality and no impact on integrity or availability. The attack vector is network-based, requiring low privileges but no user interaction, and the scope remains unchanged, meaning the vulnerability affects only the component itself without extending to other system components. The flaw could allow unauthorized access to sensitive payment-related data or operations within the WooCommerce environment, potentially exposing customer information or transaction details. However, the absence of integrity or availability impact limits the potential damage. No public exploits have been reported yet, but the vulnerability’s presence in a widely used e-commerce plugin makes it a concern for online merchants. The plugin’s integration with WooCommerce, a popular e-commerce platform, means that many European online stores could be exposed if they have not updated to a patched version. The vulnerability was reserved in late October 2025 and published in December 2025, indicating recent discovery and disclosure. The lack of available patches at the time of reporting suggests that immediate mitigation steps are necessary to reduce risk.

For European organizations, especially e-commerce businesses using WooCommerce with the Paysera payment gateway, this vulnerability poses a risk of unauthorized access to payment processing functions or sensitive customer data. Although the impact is limited to confidentiality and does not affect transaction integrity or system availability, unauthorized data exposure can lead to privacy violations, regulatory non-compliance (e.g., GDPR), and reputational damage. Attackers exploiting this flaw could gather payment-related information or manipulate payment workflows in a limited manner, potentially facilitating fraud or data leakage. The medium severity rating reflects the moderate risk level, but the widespread use of WooCommerce in Europe amplifies the potential impact. Organizations in sectors with high transaction volumes or sensitive customer data, such as retail, travel, and digital services, are particularly vulnerable. The vulnerability’s exploitation could also attract regulatory scrutiny and fines under European data protection laws if customer data is compromised.

1. Monitor for official patches or updates from Paysera and WooCommerce and apply them immediately once available. 2. In the interim, restrict access to the payment gateway plugin’s administrative and API endpoints using web application firewalls (WAFs) or network-level access controls to limit exposure to authorized personnel only. 3. Conduct a thorough review of user roles and permissions within WooCommerce to ensure that only trusted users have low-level privileges that could be exploited. 4. Implement logging and monitoring of payment gateway activities to detect unusual access patterns or unauthorized attempts. 5. Consider temporarily disabling the Paysera payment gateway plugin if feasible until a patch is applied. 6. Educate staff on the risks associated with plugin vulnerabilities and encourage prompt reporting of suspicious activity. 7. Regularly audit all third-party plugins for security compliance and update them proactively to reduce attack surface.