CVE-2020-6579 in MailBeez Plugin
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in mailhive/cloudbeez/cloudloader.php and mailhive/cloudbeez/cloudloader_core.php in the MailBeez plugin for ZenCart before 3.9.22 allows remote attackers to inject arbitrary web script or HTML via the cloudloader_mode parameter.
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Analysis
by VulDB Data Team • 05/01/2020
The CVE-2020-6579 vulnerability represents a critical cross-site scripting flaw within the MailBeez plugin for ZenCart, specifically affecting versions prior to 3.9.22. This vulnerability resides in two key files: mailhive/cloudbeez/cloudloader.php and mailhive/cloudbeez/cloudloader_core.php, which together form the core functionality of the plugin's cloud loading mechanism. The vulnerability stems from insufficient input validation and output sanitization of the cloudloader_mode parameter, creating an exploitable entry point for malicious actors to inject arbitrary web scripts or HTML content into the application's response.
The technical exploitation of this vulnerability occurs when an attacker manipulates the cloudloader_mode parameter through HTTP requests to the affected plugin endpoints. The vulnerable code fails to properly sanitize user-supplied input before incorporating it into the web page response, allowing attackers to inject malicious scripts that execute in the context of other users' browsers. This type of vulnerability falls under CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security. The attack vector is particularly concerning as it enables attackers to perform session hijacking, defacement of web pages, and potentially escalate privileges within the application's context.
From an operational perspective, this vulnerability poses significant risks to e-commerce platforms running vulnerable versions of ZenCart with the MailBeez plugin. Attackers could exploit this flaw to steal customer session cookies, redirect users to malicious sites, or inject malicious content that could compromise the integrity of the entire online store. The impact extends beyond simple data theft as the vulnerability could be leveraged to perform more sophisticated attacks such as credential theft or to establish persistent backdoors within the web application. The attack surface is particularly wide since the MailBeez plugin is commonly used across numerous ZenCart installations, making this vulnerability attractive to automated exploitation tools.
The mitigation strategy for this vulnerability requires immediate patching of the MailBeez plugin to version 3.9.22 or later, which contains the necessary input validation and sanitization fixes. Organizations should implement proper parameter validation that ensures all inputs are properly escaped before being rendered in web responses. Additionally, implementing Content Security Policy (CSP) headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. Network monitoring should be enhanced to detect anomalous requests containing suspicious payload patterns, and regular security assessments should be conducted to identify similar vulnerabilities in other plugins and components. This vulnerability aligns with ATT&CK technique T1059.007 - Command and Scripting Interpreter: PowerShell, as attackers may leverage similar patterns to inject malicious payloads through web interfaces, and represents a classic example of how third-party plugin vulnerabilities can create significant security risks for e-commerce platforms.