CVE-2025-58656 Overview
CVE-2025-58656 is a hard-coded credentials vulnerability [CWE-798] in the Estonian Shipping Methods for WooCommerce WordPress plugin developed by Risto Niinemets. The flaw affects all plugin versions up to and including 1.7.2. Unauthenticated attackers can retrieve embedded sensitive data over the network without any user interaction. The issue exposes confidential material shipped inside the plugin, which can then be reused against the affected WooCommerce store or its shipping integrations.
Critical Impact
Unauthenticated network attackers can retrieve embedded sensitive credentials from vulnerable WooCommerce stores running Estonian Shipping Methods for WooCommerce 1.7.2 and earlier.
Affected Products
- Estonian Shipping Methods for WooCommerce plugin versions up to and including 1.7.2
- WordPress sites running WooCommerce with the affected plugin installed
- Merchant environments integrating Estonian shipping carriers through this plugin
Discovery Timeline
- 2025-09-22 - CVE-2025-58656 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-58656
Vulnerability Analysis
The plugin ships with credentials embedded directly in its source code. Because these values are static and identical across every installation, any attacker who obtains a copy of the plugin gains knowledge of secrets used in production sites. Attackers can then use those secrets to interact with backend services, decrypt data, or impersonate the plugin against upstream shipping APIs.
The confidentiality-only impact means data disclosure is the primary risk, not tampering or downtime. However, disclosed credentials often become a stepping stone to broader account or API compromise. The vulnerability requires no authentication and no user interaction, making mass scanning against WordPress fingerprints a realistic exploitation path.
Root Cause
The root cause is the storage of secrets inside distributed plugin files rather than in per-site configuration. Hard-coded credentials [CWE-798] cannot be rotated by administrators and remain valid until the plugin author releases a patched build. Any user with read access to the plugin ZIP on the WordPress plugin repository can extract the same secrets used on live stores.
Attack Vector
An unauthenticated remote attacker downloads or inspects the plugin distribution to extract the embedded credentials. The attacker then reuses those credentials against endpoints that trust them, or against the store itself if the credentials gate sensitive functionality. See the Patchstack Vulnerability Report for the vendor-tracked technical writeup.
Detection Methods for CVE-2025-58656
Indicators of Compromise
- Unexpected outbound requests from the WordPress host to Estonian shipping carrier APIs using the plugin's embedded credentials
- Access log entries requesting plugin files under /wp-content/plugins/estonian-shipping-methods-for-woocommerce/ from unfamiliar sources
- Anomalous shipping-label generation or tracking-lookup activity outside normal business hours
Detection Strategies
- Inventory WordPress sites and flag any installation of Estonian Shipping Methods for WooCommerce at version 1.7.2 or earlier
- Search plugin source files for hard-coded API keys, tokens, or passwords and cross-reference with carrier-side audit logs
- Alert on repeated unauthenticated requests to plugin-owned REST or AJAX endpoints
Monitoring Recommendations
- Track file-integrity changes across the wp-content/plugins/ directory to detect tampering or unauthorized reinstalls
- Monitor shipping-carrier account activity for API calls originating from IP addresses not associated with the merchant
- Review WooCommerce order and shipment logs for unexpected status transitions tied to shipping-method automation
How to Mitigate CVE-2025-58656
Immediate Actions Required
- Upgrade the Estonian Shipping Methods for WooCommerce plugin to a version later than 1.7.2 once released by the maintainer
- Rotate any API keys or credentials associated with the plugin's shipping-carrier integrations
- Audit carrier-side account activity for misuse tied to the exposed credentials
Patch Information
At the time of publication, the vendor advisory tracked by Patchstack identifies all versions through 1.7.2 as vulnerable. Administrators should consult the Patchstack Vulnerability Report and the WordPress plugin repository for the latest fixed release.
Workarounds
- Deactivate and remove the plugin until a patched version becomes available if shipping integrations are not business-critical
- Restrict outbound traffic from the WordPress host to only the required carrier API endpoints and revoke any keys suspected of exposure
- Place the WordPress admin and plugin directories behind a web application firewall to limit unauthenticated reconnaissance
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
