CVE-2006-3337 in cPanel
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in frontend/x/files/select.html in cPanel 10.8.2-CURRENT 118 and earlier allows remote attackers to inject arbitrary web script or HTML via the file parameter.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 09/15/2025
The vulnerability identified as CVE-2006-3337 represents a critical cross-site scripting flaw within the cPanel web interface that affects versions 10.8.2-CURRENT 118 and earlier. This vulnerability resides in the frontend/x/files/select.html component of the cPanel software, which is a widely used web hosting control panel solution. The flaw specifically manifests when the application fails to properly sanitize user input passed through the file parameter, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of a victim's browser session.
The technical nature of this vulnerability aligns with CWE-79, which categorizes cross-site scripting as a code injection flaw where untrusted data is improperly incorporated into web pages without adequate validation or sanitization. The vulnerability occurs in the frontend component of cPanel, specifically in the file selection interface where user-provided file parameters are directly rendered in the web response without proper input filtering mechanisms. This allows attackers to craft malicious URLs containing script payloads that will execute in the browser of any user who accesses the vulnerable page with the crafted parameters.
The operational impact of this vulnerability is significant as it enables remote code execution within the context of authenticated user sessions. An attacker could exploit this flaw by crafting malicious URLs that, when visited by a victim, would inject malicious scripts that could steal session cookies, perform unauthorized actions on behalf of users, or redirect them to phishing sites. The vulnerability affects the integrity of the cPanel interface and could potentially allow attackers to escalate privileges or gain unauthorized access to hosting accounts. Given that cPanel is deployed across numerous web hosting environments, the potential attack surface is extensive, making this vulnerability particularly dangerous in multi-tenant hosting scenarios where one compromised account could affect others.
Mitigation strategies for this vulnerability include immediate patching of affected cPanel installations to versions that address the XSS flaw through proper input sanitization and output encoding. Organizations should implement comprehensive input validation mechanisms that filter or escape special characters in user-provided parameters before rendering them in web responses. Additionally, implementing proper content security policies and using secure coding practices that enforce proper HTML encoding of dynamic content can prevent similar vulnerabilities from occurring in the future. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for scripting and T1566.001 for valid accounts, as it leverages user sessions to execute malicious code. Regular security audits and penetration testing of web applications should be conducted to identify and remediate similar input validation weaknesses that could be exploited by threat actors.