CVE-2025-53455 in Płatności WooCommerce Plugin
Summary
by MITRE • 09/22/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CashBill CashBill.pl – Płatności WooCommerce allows Stored XSS. This issue affects CashBill.pl – Płatności WooCommerce: from n/a through 3.2.1.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 09/22/2025
This vulnerability represents a critical cross-site scripting flaw in the CashBill.pl – Płatności WooCommerce plugin, specifically targeting the web page generation process where user input is inadequately sanitized. The issue manifests as a stored XSS vulnerability, meaning malicious scripts can be permanently injected into the plugin's data storage and subsequently executed whenever affected pages are rendered to unsuspecting users. The vulnerability exists within the plugin's handling of input data during web page generation, creating an attack surface where malicious actors can inject malicious JavaScript code that persists across user sessions and page loads. This type of vulnerability directly aligns with CWE-79, which classifies cross-site scripting as a common web application security flaw where untrusted data is improperly incorporated into web pages without proper validation or sanitization.
The technical exploitation of this vulnerability occurs when the plugin fails to properly neutralize user-supplied input before incorporating it into dynamically generated web content. Attackers can leverage this weakness by submitting malicious payloads through forms or input fields that are processed by the CashBill plugin, which then stores these inputs without adequate sanitization. When other users access pages that display this stored malicious content, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The affected version range from n/a through 3.2.1 indicates that all versions within this spectrum are vulnerable, suggesting the flaw was introduced early in the plugin's development lifecycle and persisted through multiple releases without proper remediation.
The operational impact of this stored XSS vulnerability extends beyond simple data corruption or display issues, as it enables attackers to fully compromise user sessions and potentially gain administrative privileges within the affected WordPress environment. Users who view pages containing the malicious scripts could have their cookies, session tokens, or other sensitive information stolen, while attackers might leverage the vulnerability to inject backdoors or redirect users to phishing sites. This vulnerability particularly affects e-commerce environments where user trust and data security are paramount, as compromised users could have their payment information accessed or their transactions manipulated. The stored nature of the vulnerability means that once injected, the malicious code remains active until manually removed from the plugin's data stores, creating a persistent threat vector that can affect multiple users over extended periods.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to versions that address the XSS flaw, as the vendor has likely released patches to resolve the improper input neutralization issue. Organizations should implement comprehensive input validation and output encoding mechanisms to ensure that all user-supplied data is properly sanitized before being stored or displayed in web pages. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, while regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other plugins or custom code. Security teams should also consider implementing content security policies and monitoring for suspicious input patterns that could indicate attempted exploitation attempts. The vulnerability's classification under CWE-79 and its potential for enabling further attacks aligns with ATT&CK technique T1566, specifically focusing on the initial access phase through malicious input, making comprehensive monitoring and user education essential components of the overall security strategy.