CVE-2024-56265 in WooCommerce PDF Vouchers Plugin
Summary
by MITRE • 12/31/2024
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPWeb WooCommerce PDF Vouchers allows Reflected XSS.This issue affects WooCommerce PDF Vouchers: from n/a before 4.9.9.
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Analysis
by VulDB Data Team • 01/28/2026
This vulnerability represents a critical cross-site scripting flaw that exploits improper input sanitization within the WPWeb WooCommerce PDF Vouchers plugin. The weakness manifests when the application fails to adequately neutralize user-supplied data during web page generation, creating an avenue for malicious actors to inject and execute arbitrary script code within the victim's browser context. The reflected nature of this vulnerability indicates that malicious input is immediately reflected back in the application's response without proper encoding or validation, making it particularly dangerous for web applications that process user input through URL parameters or form submissions.
The technical implementation of this vulnerability stems from the plugin's failure to properly sanitize input parameters before incorporating them into dynamically generated web content. When users interact with the WooCommerce PDF Vouchers functionality, specifically when processing voucher generation or display operations, the application accepts input values that should be validated and escaped before being rendered in HTML output. This oversight creates a persistent security gap where attackers can craft malicious payloads that, when executed, can hijack user sessions, steal sensitive information, or perform unauthorized actions on behalf of authenticated users. The vulnerability operates at the application layer and specifically targets the web presentation logic where user input directly influences HTML generation.
The operational impact of this reflected XSS vulnerability extends beyond simple data theft to encompass potential session hijacking and privilege escalation within the affected WooCommerce environment. An attacker could craft malicious URLs containing script payloads that would execute when legitimate users navigate to the compromised pages, potentially stealing cookies, session tokens, or other sensitive data. Given that this affects the WooCommerce platform, which often handles financial transactions and customer data, the potential for business disruption and data compromise is significant. The vulnerability's scope is particularly concerning as it impacts users who may not be technically savvy and could unknowingly trigger the malicious code through simple navigation or interaction with compromised product pages.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to version 4.9.9 or later, which contains the necessary patches to address the input sanitization flaws. Organizations should also implement comprehensive input validation and output encoding mechanisms throughout their web applications, particularly in areas where user input is processed and displayed. Security measures including content security policies, proper input sanitization libraries, and regular security audits of third-party plugins can help prevent similar issues. Additionally, implementing web application firewalls and monitoring for suspicious input patterns can provide additional defense layers. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a clear violation of the principle of least privilege and proper input validation as outlined in various security frameworks including the OWASP Top Ten and NIST cybersecurity guidelines. Organizations should conduct thorough security assessments of their entire WooCommerce ecosystem to identify and remediate similar vulnerabilities that may exist in other plugins or custom code implementations.