CVE-2017-17954 in PHP Multivendor Ecommerce
Summary
by MITRE
PHP Scripts Mall PHP Multivendor Ecommerce has XSS via the seller-view.php usid parameter.
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Analysis
by VulDB Data Team • 03/14/2020
The vulnerability identified as CVE-2017-17954 affects PHP Scripts Mall's PHP Multivendor Ecommerce platform, specifically exposing a cross-site scripting flaw in the seller-view.php script. This issue arises from improper input validation and output encoding practices within the application's parameter handling mechanisms. The vulnerability is particularly concerning as it targets the usid parameter, which is likely used to identify and display seller information within the ecommerce platform's user interface. The flaw allows malicious actors to inject arbitrary javascript code that executes in the context of other users' browsers when they access the affected page.
The technical exploitation of this vulnerability stems from the application's failure to properly sanitize or escape user-supplied input before incorporating it into dynamic web page content. When the usid parameter is passed to seller-view.php without adequate validation or encoding, it creates an opening for attackers to inject malicious scripts that can be executed by unsuspecting users. This type of vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting flaws in web applications. The vulnerability demonstrates poor input validation practices and inadequate output encoding, both of which are fundamental security principles that should be implemented at every layer of web application development.
From an operational impact perspective, this XSS vulnerability presents significant risks to both the platform's integrity and its users' security. Attackers could potentially steal session cookies, redirect users to malicious sites, deface the platform's content, or perform actions on behalf of authenticated users. The vulnerability affects the platform's seller viewing functionality, which means that any user who accesses seller profiles could be exposed to the malicious payload. This type of attack could lead to unauthorized data access, financial loss, reputational damage, and potential regulatory compliance violations. The attack surface is particularly broad since the usid parameter is likely used throughout the platform's seller-related functionalities, making it a critical security concern.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding measures. The primary fix involves sanitizing the usid parameter through proper encoding before rendering it in the web page context, ensuring that any potentially malicious input is neutralized. Additionally, implementing a content security policy would provide an additional layer of protection against script injection attacks. The platform should also consider implementing proper input validation techniques such as whitelisting acceptable parameter values and employing regular expression matching to ensure only expected data formats are processed. Security measures should align with the ATT&CK framework's defense-in-depth principles, particularly focusing on input validation and output encoding techniques that prevent malicious code execution. Organizations should also conduct regular security assessments and code reviews to identify similar vulnerabilities across the entire application codebase.