CVE-2018-10686 in Control Panel
Summary
by MITRE
An issue was discovered in Vesta Control Panel 0.9.8-20. There is Reflected XSS via $_REQUEST['path'] to the view/file/index.php URI, which can lead to remote PHP code execution via vectors involving a file_put_contents call in web/upload/UploadHandler.php.
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Analysis
by VulDB Data Team • 03/08/2023
The vulnerability identified as CVE-2018-10686 resides within Vesta Control Panel version 0.9.8-20, representing a critical security flaw that demonstrates the dangerous intersection of reflected cross-site scripting and remote code execution capabilities. This vulnerability specifically targets the web application's handling of user input through the $_REQUEST['path'] parameter, which flows directly into the view/file/index.php URI without adequate sanitization or validation. The attack vector exploits the application's failure to properly escape or filter user-supplied data before rendering it in the web interface, creating an environment where malicious actors can inject arbitrary JavaScript code that executes in the context of other users' browsers.
The technical exploitation pathway begins with the reflected XSS vulnerability in the file viewing component, where the path parameter is directly incorporated into the page output without proper encoding or validation. This initial weakness allows attackers to craft malicious URLs that, when visited by authenticated users, execute arbitrary JavaScript in their browser sessions. However, the severity escalates significantly when considering that this vulnerability can be leveraged to achieve remote code execution through a secondary attack vector involving the web/upload/UploadHandler.php file. The UploadHandler.php component contains a file_put_contents call that, when combined with the XSS payload, can be manipulated to write malicious PHP code to the server filesystem, effectively allowing attackers to establish persistent backdoors or execute arbitrary commands on the compromised system.
From a cybersecurity perspective, this vulnerability aligns with CWE-79, which defines cross-site scripting flaws as the improper handling of input data that is reflected back to users without adequate sanitization. The attack pattern follows typical ATT&CK techniques categorized under T1059.007 for command and scripting interpreter and T1566 for spearphishing with a link, as the initial XSS payload often originates from phishing campaigns or social engineering attacks. The operational impact of this vulnerability extends beyond simple data theft, as it enables attackers to achieve complete system compromise through the combination of client-side script execution and server-side file manipulation capabilities. Organizations running Vesta Control Panel versions prior to the patched release face significant risk of unauthorized access, data exfiltration, and potential lateral movement within their network infrastructure.
The mitigation strategies for this vulnerability require immediate patching of the Vesta Control Panel to the latest stable release that addresses the input validation issues in both the view/file/index.php and web/upload/UploadHandler.php components. Security teams should implement comprehensive input validation and output encoding mechanisms throughout the application, particularly focusing on parameters that flow directly into user-facing content. Network-based solutions such as web application firewalls can provide additional protection layers by detecting and blocking malicious payloads targeting this specific vulnerability. Regular security audits and penetration testing should include validation of input handling mechanisms to prevent similar issues from emerging in other application components. The vulnerability also underscores the importance of implementing proper privilege separation and access controls, as the successful exploitation requires authenticated access to the control panel, highlighting the need for robust authentication mechanisms and principle of least privilege enforcement across all administrative interfaces.