WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels – Unauthenticated Stored Cross-Site Scripting – CVE-2024-0957| WordPress Plugin Vulnerability Report

Plugin Name: WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels

Key Information:

• Software Type: Plugin
• Software Slug: print-invoices-packing-slip-labels-for-woocommerce
• Software Status: Active
• Software Author: webtoffee
• Software Downloads: 1,355,245
• Active Installs: 50,000
• Last Updated: March 21, 2024
• Patched Versions: 4.4.2
• Affected Versions: <= 4.4.1

Vulnerability Details:

• Name: WooCommerce PDF Invoices, Packing Slips, Delivery Notes and Shipping Labels <= 4.4.1
• Title: Unauthenticated Stored Cross-Site Scripting
• Type: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
• CVE: CVE-2024-0957
• CVSS Score: 6.1
• Publicly Published: March 21, 2024
• Researcher: Colin Xu
• Description: The WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Customer Notes field in all versions up to, and including, 4.4.1 due to insufficient input sanitization and output escaping. This vulnerability allows unauthenticated attackers to inject arbitrary web scripts into pages that will execute whenever a user accesses an injected invoice for printing.

Summary:

The WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin for WordPress has a vulnerability in versions up to and including 4.4.1 that allows for stored cross-site scripting via the Customer Notes field due to insufficient input sanitization and output escaping. This vulnerability has been patched in version 4.4.2.

Detailed Overview:

This security flaw was identified by researcher Colin Xu and involves the Customer Notes field of the plugin. Due to inadequate input sanitization and output escaping, unauthenticated attackers can insert harmful scripts into these notes. When an invoice containing these notes is accessed for printing, the malicious script is executed, potentially compromising the site and its users. The disclosure of this vulnerability and the subsequent patch in version 4.4.2 were crucial steps in protecting WordPress sites using this plugin from potential exploits.

Advice for Users:

• Immediate Action: Users of the WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin should immediately update to the patched version 4.4.2.
• Check for Signs of Vulnerability: Site administrators are advised to inspect their sites for unusual or unauthorized content, particularly in invoice notes.
• Alternate Plugins: Although the vulnerability has been addressed, users may consider evaluating other plugins that offer similar functionalities as a precautionary measure.
• Stay Updated: It is essential to regularly update all plugins to their latest versions to mitigate the risk of vulnerabilities.

Conclusion:

The rapid response from the developers of the WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin in releasing a patch highlights the necessity of prompt software updates. To protect their WordPress installations, users should ensure they are running version 4.4.2 or later.

References:

• Wordfence Vulnerability Report
• Wordfence Vulnerabilities Database

Detailed Report: 

In today's fast-paced digital world, the security of your online presence is paramount. For small business owners leveraging WordPress for their e-commerce operations, this means not only managing day-to-day business activities but also ensuring that their website remains a secure gateway for customers. A stark reminder of this ongoing responsibility is the recent discovery of a significant vulnerability in the WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin, a tool integral to over 50,000 businesses worldwide.

Plugin Overview:

The WooCommerce PDF Invoices, Packing Slips, Delivery Notes, and Shipping Labels plugin, developed by webtoffee, is designed to enhance e-commerce operations by generating essential documents directly from WooCommerce orders. With over 1.3 million downloads, this plugin is a staple in many online stores, facilitating seamless transactions and customer interactions.

The Vulnerability:

Identified as CVE-2024-0957, this vulnerability poses a threat through unauthenticated stored cross-site scripting (XSS) within the Customer Notes field. Exploited, it allows attackers to inject malicious scripts that are executed when an invoice is viewed or printed. The issue, arising from insufficient input sanitization and output escaping, affects versions up to and including 4.4.1. It was brought to light by security researcher Colin Xu on March 21, 2024, emphasizing the ever-present need for vigilance in the digital space.

Risks and Impacts:

The potential impacts of this vulnerability are far-reaching. Successful exploitation could compromise sensitive customer information, disrupt business operations, and damage the trust and reputation painstakingly built by businesses with their clientele. In a worst-case scenario, it could even lead to complete site takeover by malicious entities.

Remediation Steps:

In response to this vulnerability, the plugin developers promptly released version 4.4.2, which addresses the flaw and secures the plugin against similar attacks in the future. Users of the plugin are urged to update to this latest version immediately to protect their sites. Additionally, site administrators should review their sites for any unusual or unauthorized content, especially within invoice notes, to ensure no previous exploitation has occurred.

Previous Vulnerabilities:

This is not the first time vulnerabilities have been discovered in this plugin. Since December 27, 2023, there have been two other documented vulnerabilities, reinforcing the importance of regular updates and monitoring of security advisories.

For small business owners, the digital aspect of your business might seem daunting, especially with the technicalities of maintaining a secure website. However, the recent vulnerability and its swift resolution highlight a critical aspect of digital business management: the importance of staying on top of security updates. Neglecting this aspect can have dire consequences, not just for your business's online operations but for your customers' trust and your brand's reputation. While it may seem like a significant demand on your time, the peace of mind and security it brings to your online business dealings are invaluable. Remember, in the realm of cybersecurity, an ounce of prevention is truly worth a pound of cure.