CVE-2025-48111: YITH PayPal Express Checkout CSRF Flaw

CVE-2025-48111 Overview

CVE-2025-48111 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the YITHEMES YITH PayPal Express Checkout for WooCommerce plugin. The flaw impacts all plugin versions from an unspecified release through 1.49.0. An attacker can trick an authenticated user into submitting forged HTTP requests to the vulnerable WordPress site. Successful exploitation requires user interaction, such as clicking a crafted link or visiting an attacker-controlled page. The vulnerability was published to the National Vulnerability Database (NVD) on June 17, 2025.

Critical Impact
An attacker can coerce an authenticated WordPress user into performing unintended state-changing actions in the YITH PayPal Express Checkout plugin, resulting in limited integrity impact on the target site.

Affected Products

YITHEMES YITH PayPal Express Checkout for WooCommerce plugin
Plugin versions from n/a through 1.49.0
WordPress sites running WooCommerce with the affected plugin enabled

Discovery Timeline

2025-06-17 - CVE-2025-48111 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-48111

Vulnerability Analysis

The vulnerability stems from missing or insufficient CSRF protection in the YITH PayPal Express Checkout for WooCommerce plugin. Cross-Site Request Forgery [CWE-352] occurs when a web application accepts state-changing requests without verifying that the request was intentionally submitted by the authenticated user. In WordPress plugins, this protection is typically implemented through nonce validation using functions such as wp_verify_nonce() or check_admin_referer(). The affected plugin versions through 1.49.0 fail to validate request origin properly on one or more endpoints. Exploitation requires user interaction, and the impact is limited to integrity — no confidentiality or availability loss is reported.

Root Cause

The root cause is the absence of adequate anti-CSRF tokens or referer validation on request handlers exposed by the plugin. When a privileged user visits a malicious page while authenticated to the WordPress admin, the browser automatically attaches session cookies to forged requests targeting the vulnerable endpoints. The plugin processes those requests as legitimate administrative actions.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker crafts a malicious web page or email containing HTML forms or JavaScript that automatically submits requests to the target WordPress site. If the victim has an active authenticated session with the vulnerable plugin, the forged request executes with the victim's privileges. See the Patchstack CSRF Vulnerability Report for additional technical details.

Detection Methods for CVE-2025-48111

Indicators of Compromise

Unexpected configuration changes within the YITH PayPal Express Checkout plugin settings.
HTTP POST requests to plugin admin endpoints with missing or invalid _wpnonce parameters.
Referer headers pointing to unrelated external domains on state-changing plugin requests.
Administrative actions originating from user sessions immediately after visiting untrusted external sites.

Detection Strategies

Inspect WordPress access logs for POST requests to the plugin's admin-ajax or settings endpoints that lack proper nonce parameters.
Enable WordPress audit logging plugins to record configuration changes and correlate them with user browsing activity.
Monitor for anomalous administrative activity performed shortly after users interact with external links or emails.

Monitoring Recommendations

Aggregate WordPress and web server logs into a centralized SIEM for correlation of authentication events and plugin state changes.
Alert on plugin setting modifications outside approved change windows or maintenance activity.
Track Referer and Origin header anomalies on requests hitting WooCommerce and YITH plugin endpoints.

How to Mitigate CVE-2025-48111

Immediate Actions Required

Update the YITH PayPal Express Checkout for WooCommerce plugin to a version later than 1.49.0 as soon as a fixed release is published by YITHEMES.
Restrict WordPress administrative access to trusted networks and require multi-factor authentication for privileged accounts.
Instruct administrators to log out of WordPress sessions when not actively managing the site to reduce CSRF exposure.

Patch Information

At the time of publication, the vendor advisory referenced through the Patchstack CSRF Vulnerability Report identifies versions through 1.49.0 as affected. Administrators should monitor the YITHEMES vendor site and the WordPress plugin repository for a patched release and apply it promptly.

Workarounds

Deploy a Web Application Firewall (WAF) rule that enforces Referer and Origin header validation for requests targeting YITH plugin endpoints.
Temporarily deactivate the YITH PayPal Express Checkout for WooCommerce plugin if PayPal Express Checkout functionality is not business-critical.
Enforce browser session isolation for administrators by using a dedicated browser profile for WordPress management tasks.

bash

# Configuration example: sample ModSecurity rule to require same-origin for plugin admin requests
SecRule REQUEST_URI "@contains /wp-admin/admin.php?page=yith" \
    "id:1004811,phase:1,deny,status:403,\
     chain,msg:'Blocked cross-origin request to YITH plugin endpoint'"
    SecRule REQUEST_HEADERS:Origin "!@beginsWith https://your-wordpress-site.example" \
        "t:none"