CVE-2025-49958 identifies a reflected Cross-site Scripting (XSS) vulnerability in the Robokassa payment gateway plugin for WooCommerce, versions up to 1.8.1. The vulnerability stems from improper neutralization of user-supplied input during web page generation, which allows attackers to inject malicious JavaScript code that executes in the context of the victim's browser session. This reflected XSS does not require authentication but does require user interaction, typically by convincing a user to click a crafted URL or visit a malicious site that triggers the vulnerable page. The CVSS 3.1 base score is 7.1, reflecting a high severity with network attack vector, low attack complexity, no privileges required, but user interaction needed, and a scope change indicating that the vulnerability can affect components beyond the initially vulnerable software. The impact includes potential theft of session cookies, manipulation of payment transactions, redirection to malicious sites, or denial of service conditions. Although no known exploits are currently reported in the wild, the vulnerability poses a significant risk to e-commerce platforms using this plugin. The Robokassa payment gateway is widely used in WooCommerce installations, which is a popular e-commerce platform globally, including Europe. The vulnerability was reserved in June 2025 and published in October 2025, but no patch links are currently available, indicating that organizations must be vigilant for forthcoming updates. The reflected XSS vulnerability can be leveraged by attackers to compromise user accounts, steal sensitive information, or disrupt payment processes, potentially causing financial and reputational damage to affected organizations.

For European organizations, this vulnerability poses a significant risk to the confidentiality, integrity, and availability of e-commerce transactions. Attackers exploiting this reflected XSS can hijack user sessions, steal sensitive payment and personal data, or manipulate transaction details, leading to financial fraud and loss of customer trust. The vulnerability could also be used to deliver further malware or phishing attacks targeting customers of affected online stores. Given the widespread use of WooCommerce in Europe and the integration of Robokassa as a payment gateway, especially in countries with high e-commerce penetration, the threat could disrupt business operations and damage brand reputation. Additionally, regulatory compliance risks arise under GDPR if personal data is compromised. The lack of a current patch increases exposure time, making timely mitigation critical. Organizations relying on this payment gateway must consider the risk of targeted attacks exploiting this vulnerability to gain unauthorized access or disrupt payment workflows.

1. Monitor official Robokassa and WooCommerce channels for the release of a security patch addressing CVE-2025-49958 and apply it immediately upon availability. 2. In the interim, implement Web Application Firewalls (WAF) with rules specifically designed to detect and block reflected XSS payloads targeting the payment gateway endpoints. 3. Review and harden input validation and output encoding mechanisms within the WooCommerce environment, especially for payment gateway parameters, to prevent injection of malicious scripts. 4. Educate users and administrators about the risks of clicking untrusted links related to payment processing pages. 5. Conduct regular security assessments and penetration testing focusing on e-commerce payment flows to identify and remediate similar vulnerabilities. 6. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. 7. Monitor logs for unusual activity or error messages that could indicate attempted exploitation. 8. Consider temporarily disabling or replacing the Robokassa payment gateway if patching is delayed and risk is deemed unacceptable.