CVE-2019-9226 in baigo
Summary
by MITRE
An issue was discovered in baigo CMS 2.1.1. There is a persistent XSS vulnerability that allows remote attackers to inject arbitrary web script or HTML via the opt[base][BG_SITE_NAME] parameter to the bg_console/index.php?m=opt&c=request URI.
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Analysis
by VulDB Data Team • 07/26/2023
The vulnerability identified as CVE-2019-9226 represents a critical persistent cross-site scripting flaw within baigo CMS version 2.1.1. This security weakness exists in the console administration interface where user input is not properly sanitized before being stored and subsequently rendered back to users. The specific attack vector involves manipulation of the opt[base][BG_SITE_NAME] parameter through the bg_console/index.php?m=opt&c=request URI endpoint, allowing malicious actors to inject persistent script code that executes in the context of other users' browsers.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the CMS's configuration management system. When administrators or users interact with the site name configuration parameter, the application fails to properly escape special characters and script tags, creating an environment where malicious payloads can be stored in the database and executed whenever the affected page is accessed. This persistent nature means that the malicious code remains active until manually removed from the system configuration, making it particularly dangerous for long-term exploitation.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to perform session hijacking, steal sensitive administrative credentials, redirect users to malicious sites, or execute arbitrary commands within the browser context of authenticated users. Given that this affects the CMS console interface, successful exploitation could lead to complete system compromise, allowing attackers to modify content, create new administrative accounts, or access sensitive data. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a significant concern under the ATT&CK framework's initial access and execution phases where adversaries leverage web application vulnerabilities to establish footholds.
Mitigation strategies for CVE-2019-9226 should prioritize immediate patching of the baigo CMS to version 2.1.2 or later, which contains the necessary input sanitization fixes. Organizations should also implement proper input validation at multiple layers including client-side and server-side filtering, employ content security policies to prevent unauthorized script execution, and conduct regular security assessments of web applications. Additionally, administrators should review and restrict administrative access permissions, implement web application firewalls to detect suspicious parameter manipulation, and establish monitoring procedures to identify potential exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation in web applications and serves as a reminder of the persistent risks associated with inadequate sanitization of user-provided data in CMS platforms.