CVE-2019-9841 in Control Panel
Summary
by MITRE
Vesta Control Panel 0.9.8-23 allows XSS via a crafted URL.
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Analysis
by VulDB Data Team • 09/05/2023
The vulnerability identified as CVE-2019-9841 affects Vesta Control Panel version 0.9.8-23, representing a cross-site scripting flaw that enables remote attackers to inject malicious scripts into web applications. This vulnerability resides within the web interface of the control panel, which is commonly used for managing web hosting services including domain configuration, user management, and server administration tasks. The affected system processes user-supplied input without adequate sanitization or validation, creating an attack surface where malicious actors can manipulate URL parameters to execute arbitrary JavaScript code in the context of authenticated users' browsers.
The technical implementation of this vulnerability stems from insufficient input validation mechanisms within the Vesta Control Panel's URL handling functionality. When users navigate to specific crafted URLs containing malicious script payloads, the application fails to properly escape or filter these inputs before rendering them in web responses. This allows attackers to inject HTML and JavaScript code that executes within the victim's browser session, potentially compromising user sessions and enabling further exploitation. The vulnerability specifically targets the application's parameter processing logic, where URL query strings and path parameters are directly incorporated into web page content without appropriate security measures.
The operational impact of CVE-2019-9841 extends beyond simple script execution, as it can lead to complete session hijacking and privilege escalation within the control panel environment. An attacker who successfully exploits this vulnerability can steal authentication cookies, access sensitive administrative functions, and potentially gain unauthorized access to hosting accounts managed through the compromised control panel. This vulnerability aligns with CWE-79, which categorizes cross-site scripting flaws as weaknesses in input validation and output encoding. The attack vector specifically maps to ATT&CK technique T1059.007 for command and scripting interpreter, where JavaScript-based attacks are executed through web browsers to compromise user sessions and system integrity.
Mitigation strategies for CVE-2019-9841 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the Vesta Control Panel application. Organizations should immediately apply the vendor-provided security patches and updates to address the vulnerability. Additionally, implementing proper HTML escaping and content security policies can help prevent script injection attempts. Network-level protections such as web application firewalls and URL filtering can provide additional defense-in-depth measures. Regular security assessments and input validation reviews should be conducted to identify and remediate similar vulnerabilities. The vulnerability demonstrates the critical importance of secure coding practices and proper input sanitization in web applications, particularly those handling administrative functions and user authentication. Organizations using Vesta Control Panel should also consider implementing monitoring solutions to detect anomalous URL access patterns that may indicate exploitation attempts.