CVE-2020-22808 in yii2_fecshop
Summary
by MITRE • 04/30/2021
An issue was found in yii2_fecshop 2.x. There is a reflected XSS vulnerability in the check cart page.
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Analysis
by VulDB Data Team • 05/03/2021
The vulnerability identified as CVE-2020-22808 represents a critical security flaw within the yii2_fecshop 2.x e-commerce platform, specifically affecting the check cart page functionality. This issue manifests as a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability stems from insufficient input validation and output encoding mechanisms within the cart page implementation, creating an exploitable entry point for malicious actors to execute arbitrary code in the context of victims' browsers. The flaw is particularly concerning as it directly impacts the shopping cart functionality, which is a core component of any e-commerce system and typically handles sensitive user data including product selections, quantities, and potentially personal information.
The technical nature of this vulnerability aligns with CWE-79, which categorizes cross-site scripting flaws as weaknesses in web applications that allow attackers to inject malicious scripts into web pages viewed by other users. In the context of yii2_fecshop 2.x, the reflected XSS occurs when user input from the cart page is not properly sanitized before being rendered back to the browser. Attackers can craft malicious URLs containing script payloads that, when executed by unsuspecting users, can steal session cookies, redirect users to malicious sites, or perform unauthorized actions on behalf of the victims. The vulnerability's exploitation requires users to click on specially crafted links that contain the malicious payload, making it a server-side vulnerability that relies on client-side execution to cause harm. The reflected nature of the vulnerability means that the malicious script is reflected off the web server rather than being stored, making it more difficult to detect through traditional security scanning methods.
The operational impact of CVE-2020-22808 extends beyond simple script execution, as it can potentially lead to complete account compromise and data theft within the e-commerce environment. When users navigate to the affected cart page with malicious input, their browsers execute the injected scripts, which can then access and exfiltrate sensitive information including session tokens, personal details, and potentially payment information. The vulnerability's presence in the cart functionality makes it particularly dangerous as users are naturally inclined to interact with shopping cart pages, increasing the likelihood of successful exploitation. Security researchers have noted that reflected XSS vulnerabilities in e-commerce platforms pose significant risks to both customer privacy and business integrity, as they can facilitate unauthorized transactions and data breaches. The attack surface is further expanded due to the widespread use of yii2_fecshop 2.x across various online retail environments, making this vulnerability potentially impactful across multiple organizations.
Mitigation strategies for CVE-2020-22808 must focus on implementing robust input validation and output encoding mechanisms within the yii2_fecshop platform. The primary remediation approach involves sanitizing all user inputs before processing and ensuring proper HTML escaping when rendering data back to users. Organizations should implement Content Security Policy (CSP) headers to limit script execution and prevent unauthorized code injection. Additionally, the application should employ proper parameter validation and use framework-specific security features to prevent XSS vulnerabilities. Security teams should conduct regular penetration testing and code reviews focusing on input handling within the cart functionality to identify similar vulnerabilities. The implementation of Web Application Firewall (WAF) rules specifically targeting XSS patterns can provide an additional layer of protection. Organizations using yii2_fecshop 2.x should also monitor for patched versions of the framework and apply updates promptly to address the vulnerability. The remediation process should include comprehensive testing to ensure that the fixes do not break existing functionality while effectively preventing script injection attacks. According to ATT&CK framework, this vulnerability maps to T1059.008 for the execution of malicious scripts and T1566 for the initial compromise through social engineering or malicious links, emphasizing the need for both technical and user awareness-based defenses.