CVE-2025-39564 Overview
CVE-2025-39564 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the WP Trio Conditional Shipping for WooCommerce plugin. The flaw affects all versions up to and including 3.4.0 of the conditional-shipping-for-woocommerce WordPress plugin. An attacker can craft a malicious web page that, when visited by an authenticated administrator, triggers unintended state-changing actions on the target WordPress site. The vulnerability requires user interaction and results in a high impact on availability.
Critical Impact
Successful exploitation allows attackers to force authenticated administrators to perform unintended actions on the WooCommerce shipping configuration, potentially disrupting store availability.
Affected Products
- WP Trio Conditional Shipping for WooCommerce plugin
- Versions from n/a through <= 3.4.0
- WordPress sites running WooCommerce with the affected plugin
Discovery Timeline
- 2025-04-16 - CVE-2025-39564 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-39564
Vulnerability Analysis
The vulnerability stems from missing or improperly implemented CSRF protection in state-changing endpoints of the Conditional Shipping for WooCommerce plugin. When an authenticated WordPress administrator visits an attacker-controlled page, the browser automatically forwards session cookies to the vulnerable plugin endpoints. This allows the attacker to trigger administrative actions without the administrator's knowledge or consent.
The attack is network-accessible, requires no privileges from the attacker, but does require the victim to interact with attacker-controlled content. The impact centers on availability, indicating the affected actions can disrupt normal store operations such as shipping rule configuration.
Root Cause
The root cause is the absence of proper anti-CSRF nonce validation on plugin request handlers. WordPress provides wp_nonce_field() and check_admin_referer() primitives to prevent CSRF, but the affected plugin does not enforce nonce checks on all state-changing operations. Requests that modify plugin configuration are accepted based solely on the presence of a valid session cookie.
Attack Vector
An attacker hosts a malicious page containing an auto-submitting form or JavaScript that issues a request to the target WordPress site's plugin endpoint. When an authenticated administrator loads the page, the browser sends the request with valid session credentials. The plugin processes the request as legitimate because no nonce or origin validation is performed. The attacker can chain this with social engineering techniques such as phishing emails or malicious links to reach the administrator.
See the Patchstack WordPress Vulnerability advisory for additional technical context.
Detection Methods for CVE-2025-39564
Indicators of Compromise
- Unexpected changes to WooCommerce shipping rules or conditional shipping configuration.
- HTTP requests to plugin admin endpoints containing a Referer header from an external domain.
- Administrator-initiated POST requests to plugin actions lacking the expected _wpnonce parameter.
- Anomalous administrator activity shortly after clicking external links or opening emails.
Detection Strategies
- Monitor WordPress admin action logs for state-changing requests to conditional-shipping-for-woocommerce endpoints.
- Correlate administrator browser activity with configuration changes to identify requests originating from external referrers.
- Deploy a Web Application Firewall (WAF) rule to flag POST requests to plugin endpoints missing nonce tokens.
Monitoring Recommendations
- Enable WordPress audit logging to capture all plugin configuration changes with timestamps and user attribution.
- Alert on shipping rule modifications occurring outside normal business hours or maintenance windows.
- Track administrator session activity for unusual navigation patterns preceding configuration changes.
How to Mitigate CVE-2025-39564
Immediate Actions Required
- Update the Conditional Shipping for WooCommerce plugin to a version newer than 3.4.0 once a patched release is available.
- Restrict WordPress administrator accounts and require administrators to log out when not actively managing the site.
- Deploy a WAF with CSRF protection rules covering WordPress admin endpoints.
Patch Information
Refer to the Patchstack advisory for current patch status and vendor guidance. Administrators should upgrade to the latest available plugin release from the WordPress plugin repository.
Workarounds
- Disable or uninstall the Conditional Shipping for WooCommerce plugin until a patched version is installed.
- Enforce two-factor authentication for all WordPress administrator accounts to reduce the value of hijacked sessions.
- Configure browser session isolation so administrators do not browse untrusted content while logged into WordPress.
- Implement strict SameSite=Lax or SameSite=Strict cookie attributes for the WordPress session cookie where compatible.
# Configuration example: temporarily deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate conditional-shipping-for-woocommerce
wp plugin update conditional-shipping-for-woocommerce
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
