CVE-2019-7934 in Magento
Summary
by MITRE
A stored cross-site scripting vulnerability exists in the admin panel of Magento Open Source prior to 1.9.4.2, and Magento Commerce prior to 1.14.4.2, Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This could be exploited by an authenticated user with privileges to edit newsletter templates to inject malicious javascript.
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Analysis
by VulDB Data Team • 07/20/2020
This stored cross-site scripting vulnerability in Magento's admin panel represents a critical security flaw that allows authenticated attackers to persist malicious javascript code within the system. The vulnerability specifically affects multiple versions of Magento Open Source and Commerce platforms, creating a significant risk for organizations relying on these e-commerce solutions. The flaw exists in the newsletter template editing functionality, which is commonly used by administrators to create promotional content for customer communications.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the admin panel's template handling mechanisms. When administrators edit newsletter templates, the system fails to properly sanitize user-supplied content before storing it in the database. This stored content is then later rendered in the admin interface without adequate protection against cross-site scripting attacks. The vulnerability is particularly concerning because it requires only authentication privileges to exploit, making it accessible to users with legitimate access to the administrative functions of the platform.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the ability to execute arbitrary javascript code within the context of the admin session. This could enable attackers to steal session cookies, perform unauthorized actions on behalf of administrators, access sensitive customer data, or even escalate privileges within the system. The stored nature of the vulnerability means that once exploited, the malicious code persists and can affect all users who view the compromised template, potentially affecting hundreds or thousands of administrators across an organization. Attackers could leverage this vulnerability to gain persistent access to the administrative interface, undermining the integrity of the entire e-commerce platform.
Organizations should prioritize immediate patching of affected Magento versions to address this vulnerability, following the vendor's recommended security updates for each affected release. The mitigation strategy should include implementing proper input validation and output encoding mechanisms throughout the admin panel, particularly in template editing functionalities. Security teams should also consider implementing additional monitoring for suspicious template modifications and establishing strict access controls for administrative functions. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a technique commonly referenced in ATT&CK framework under the T1059.007 category for scripting languages, as it enables attackers to execute malicious code through the web interface. Regular security assessments of admin panel functionalities and comprehensive user privilege management are essential to prevent exploitation of similar stored XSS vulnerabilities in e-commerce platforms.