CVE-2025-58656 is a medium-severity vulnerability classified under CWE-798, which pertains to the use of hard-coded credentials. This vulnerability affects the "Estonian Shipping Methods for WooCommerce" plugin developed by Risto Niinemets, specifically versions up to 1.7.2. The issue arises because the plugin contains embedded credentials within its codebase that are hard-coded and not dynamically managed or configurable by administrators. Such hard-coded credentials can be extracted by an attacker who has access to the plugin files or can trigger functionality that exposes these credentials. The vulnerability allows an unauthenticated remote attacker to retrieve sensitive embedded data without requiring user interaction or privileges. According to the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), the attack can be performed remotely over the network with low attack complexity, no privileges, and no user interaction, impacting confidentiality but not integrity or availability. The plugin is used within WooCommerce, a popular e-commerce platform on WordPress, to provide shipping methods tailored for Estonia. The presence of hard-coded credentials can lead to unauthorized disclosure of sensitive information, potentially enabling further attacks such as unauthorized access to backend systems or misuse of shipping configurations. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating that users should be cautious and monitor for updates. The vulnerability was published on September 22, 2025, and reserved earlier that month, indicating recent discovery and disclosure.

For European organizations, particularly e-commerce businesses operating in or targeting the Estonian market, this vulnerability poses a risk of sensitive data leakage that could compromise customer trust and operational security. Since WooCommerce is widely used across Europe, organizations using this specific plugin may inadvertently expose embedded credentials that could be leveraged to gain unauthorized access to shipping configurations or related backend services. This could lead to data breaches involving customer shipping information or manipulation of shipping options, potentially disrupting order fulfillment. Although the direct impact on system integrity and availability is low, the confidentiality breach could facilitate further attacks or fraud. Additionally, regulatory frameworks such as GDPR impose strict requirements on protecting personal data, and exposure of sensitive credentials could lead to compliance violations and financial penalties. The risk is heightened for organizations that have not implemented compensating controls or monitoring around plugin usage and file integrity.

Organizations using the Estonian Shipping Methods for WooCommerce plugin should immediately audit their installations to determine if they are running affected versions (up to 1.7.2). Until an official patch is released, it is advisable to remove or disable the plugin if it is not essential. If the plugin is critical, restrict access to the WordPress file system and plugin directories to trusted administrators only, using file permissions and web server configurations to prevent unauthorized reading of plugin files. Employ web application firewalls (WAFs) to detect and block suspicious requests attempting to access plugin internals. Monitor logs for unusual access patterns targeting the plugin. Additionally, consider isolating the WooCommerce environment and enforcing strict credential management policies to avoid reliance on embedded secrets. Stay alert for vendor updates or patches and apply them promptly once available. Conduct regular security assessments and vulnerability scans focusing on WordPress plugins to detect similar issues proactively.