CVE-2025-31000: Payment QR WooCommerce Auth Bypass Flaw

CVE-2025-31000 Overview

CVE-2025-31000 is a missing authorization vulnerability in the Miguel Fuentes Payment QR WooCommerce plugin (payment-qr-woo) for WordPress. The flaw stems from incorrectly configured access control security levels [CWE-862], allowing unauthenticated attackers to exploit endpoints that lack proper permission checks. The issue affects all versions of Payment QR WooCommerce up to and including 1.1.6. Exploitation requires no authentication, no user interaction, and can be performed remotely over the network. The vulnerability impacts the integrity of the affected WooCommerce store by allowing unauthorized access to functionality that should be restricted to privileged users.

Critical Impact
Unauthenticated remote attackers can invoke plugin functionality that should require authorization, leading to unauthorized modifications on affected WooCommerce sites.

Affected Products

Miguel Fuentes Payment QR WooCommerce plugin (payment-qr-woo)
All versions from n/a through 1.1.6
WordPress sites running WooCommerce with the plugin enabled

Discovery Timeline

2025-06-06 - CVE-2025-31000 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31000

Vulnerability Analysis

The vulnerability is classified under [CWE-862] Missing Authorization. The Payment QR WooCommerce plugin exposes one or more actions or endpoints without verifying that the requesting user holds the required capability or role. As a result, requests from unauthenticated actors reach handlers that assume authorization has already been established. This category of flaw is common in WordPress plugins that register AJAX handlers, REST routes, or admin-post actions without invoking current_user_can() or a nonce validation flow. According to the Patchstack Vulnerability Advisory, the flaw is characterized as broken access control affecting the plugin's request handling.

Root Cause

The root cause is the absence of a capability check on privileged plugin functionality. WordPress plugin developers must explicitly validate the acting user's role before performing state-changing operations. When such checks are omitted, any network client can invoke the handler by crafting the appropriate request to the WordPress site.

Attack Vector

An attacker sends a crafted HTTP request to the vulnerable endpoint registered by the Payment QR WooCommerce plugin. Because no authentication or capability check is performed, the plugin executes the requested action. The impact is limited to integrity, meaning the attacker can influence data or configuration exposed by the vulnerable handler but cannot directly extract sensitive data or cause a denial of service through this flaw alone.

// No verified public exploit code is available for CVE-2025-31000.
// The vulnerability is triggered by sending an unauthenticated HTTP
// request to a plugin endpoint that lacks a capability check.
// Refer to the Patchstack advisory for technical specifics.

Detection Methods for CVE-2025-31000

Indicators of Compromise

Unauthenticated POST or GET requests to WordPress endpoints associated with the payment-qr-woo plugin path.
Unexpected modifications to WooCommerce order metadata, payment QR configurations, or plugin settings without a corresponding administrator login event.
Access log entries showing requests to admin-ajax.php or REST routes referencing plugin actions from clients that did not authenticate.

Detection Strategies

Review web server access logs for requests to plugin-specific action names or REST routes originating from unauthenticated sessions.
Correlate WordPress audit logs with plugin configuration changes to identify actions taken without an authenticated user context.
Deploy a Web Application Firewall (WAF) rule to alert on requests targeting the payment-qr-woo plugin without valid session cookies or nonces.

Monitoring Recommendations

Monitor the installed version of payment-qr-woo across WordPress environments and flag any instance at version 1.1.6 or earlier.
Enable file integrity monitoring on the WordPress wp-content/plugins/payment-qr-woo/ directory.
Track outbound HTTP requests initiated by the WordPress host that could indicate follow-on abuse of unauthorized configuration changes.

How to Mitigate CVE-2025-31000

Immediate Actions Required

Identify all WordPress installations using the Payment QR WooCommerce plugin and confirm the installed version.
Update the plugin to a version later than 1.1.6 once a patched release is available from the vendor.
If no fixed version is available, disable and remove the payment-qr-woo plugin until a patch is published.
Review WooCommerce configuration and recent order data for unauthorized changes.

Patch Information

At the time of publication, the Patchstack Vulnerability Advisory lists all versions through 1.1.6 as affected. Administrators should monitor the vendor page and the WordPress plugin repository for an updated release that adds the missing capability checks.

Workarounds

Deactivate the Payment QR WooCommerce plugin until a fixed version is published.
Restrict access to /wp-admin/admin-ajax.php and plugin REST routes at the WAF layer for unauthenticated clients where feasible.
Apply virtual patching rules via a WAF to block requests targeting the vulnerable plugin actions.

bash

# Example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate payment-qr-woo
wp plugin delete payment-qr-woo