CVE-2023-46499 in EverShop NPM
Summary
by MITRE • 12/08/2023
Cross Site Scripting vulnerability in EverShop NPM versions before v.1.0.0-rc.5 allows a remote attacker to obtain sensitive information via a crafted scripts to the Admin Panel.
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Analysis
by VulDB Data Team • 12/06/2025
The CVE-2023-46499 vulnerability represents a critical cross site scripting flaw discovered in the EverShop e-commerce platform's npm packages prior to version 1.0.0-rc.5. This vulnerability specifically targets the administrative panel interface, creating a significant security risk for organizations relying on this platform for their online commerce operations. The flaw enables remote attackers to inject malicious scripts that can compromise the integrity and confidentiality of sensitive administrative data. The vulnerability stems from inadequate input validation and output encoding mechanisms within the admin panel's script handling processes, allowing malicious actors to execute arbitrary code in the context of an authenticated administrator's browser session.
This XSS vulnerability operates through a sophisticated attack vector that leverages the platform's administrative interface to deliver malicious payloads. The technical implementation involves the exploitation of insufficient sanitization of user-supplied input parameters that are subsequently rendered in the admin panel without proper encoding. Attackers can craft malicious scripts that, when processed by the vulnerable admin panel, execute in the browser context of authenticated administrators. The vulnerability is classified under CWE-79 as a Cross-Site Scripting flaw, which specifically addresses the improper handling of untrusted data within web applications. This weakness allows attackers to bypass normal access controls and potentially escalate privileges, as the malicious scripts can interact with the admin panel's functionality and access sensitive information.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to perform administrative actions that compromise the entire platform. Once an attacker successfully exploits this XSS vulnerability, they can access sensitive information including user credentials, customer data, product inventory details, and financial transaction records. The attack surface is particularly concerning because it targets the administrative panel where privileged operations occur, potentially allowing attackers to modify product listings, adjust pricing, manipulate customer accounts, and even delete critical system components. This vulnerability directly violates the principle of least privilege and can result in complete system compromise, as demonstrated by the ATT&CK framework's T1078 technique for Valid Accounts and T1566 for Phishing, which both relate to unauthorized access and privilege escalation through web-based attacks.
Mitigation strategies for CVE-2023-46499 require immediate implementation of multiple defensive measures to protect against exploitation. Organizations should prioritize upgrading to EverShop version 1.0.0-rc.5 or later, which includes proper input validation and output encoding mechanisms. Additionally, implementing Content Security Policy headers can provide an additional layer of protection by restricting script execution within the admin panel environment. The implementation of proper input sanitization techniques, including the use of context-appropriate encoding for all user-supplied data, should be enforced throughout the application's data handling pipeline. Network-level protections such as web application firewalls can help detect and block malicious payloads attempting to exploit this vulnerability. Security monitoring should be enhanced to detect unusual administrative activities that might indicate successful exploitation attempts, while regular security assessments should verify that all input validation mechanisms are properly implemented across the entire platform. The remediation process should also include comprehensive testing of the admin panel's response to various payload types to ensure that the vulnerability has been effectively addressed.