CVE-2008-2070 in cPanel
Summary
by MITRE
The WHM interface 11.15.0 for cPanel 11.18 before 11.18.4 and 11.22 before 11.22.3 allows remote attackers to bypass XSS protection and inject arbitrary script or HTML via repeated, improperly-ordered "<" and ">" characters in the (1) issue parameter to scripts2/knowlegebase, (2) user parameter to scripts2/changeip, (3) search parameter to scripts2/listaccts, and other unspecified vectors.
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Analysis
by VulDB Data Team • 05/15/2025
The vulnerability identified as CVE-2008-2070 represents a critical cross-site scripting flaw within the WHM interface version 11.15.0 of cPanel software. This security weakness affects cPanel versions 11.18 before 11.18.4 and 11.22 before 11.22.3, creating a significant risk for web hosting environments where administrators rely on the WHM interface for system management. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly handle malformed HTML character sequences, specifically improper ordering of angle brackets in user-supplied parameters.
The technical implementation of this vulnerability exploits the insufficient sanitization of user input in multiple script endpoints within the WHM interface. Attackers can manipulate the issue parameter in scripts2/knowlegebase, the user parameter in scripts2/changeip, and the search parameter in scripts2/listaccts by strategically placing repeated "<" and ">" characters in improper sequences. This specific manipulation bypasses the built-in XSS protection mechanisms that are designed to filter malicious content before it can be rendered in the browser. The flaw operates at the application layer, specifically targeting the input processing logic that should validate and sanitize all user-provided data before it is processed or displayed.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to execute arbitrary code within the context of the victim's browser session. An attacker who successfully exploits this vulnerability could potentially steal administrative credentials, modify system configurations, or gain unauthorized access to sensitive hosting environment data. The vulnerability affects the entire WHM administrative interface, making it a high-value target for attackers seeking to compromise hosting infrastructure. Given that WHM interfaces typically contain sensitive administrative functions and system-level information, the potential damage from successful exploitation is substantial.
The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in software applications, and demonstrates the importance of proper input validation and output encoding. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communications and privilege escalation through web application exploitation. The attack vector leverages the trust relationship between the web application and its users, making it particularly dangerous in environments where administrators regularly interact with the WHM interface. Organizations should note that this vulnerability was present in widely deployed versions of cPanel, indicating the potential for widespread impact across the hosting industry.
Mitigation strategies should include immediate patching of affected cPanel versions to 11.18.4 or 11.22.3, respectively, as these releases contain the necessary fixes for the XSS protection bypass. Additionally, implementing proper input validation and sanitization measures at the application level, including the use of Content Security Policy headers, can provide additional defense-in-depth. Organizations should also consider implementing web application firewalls to detect and block malicious input patterns, while conducting regular security assessments to identify similar vulnerabilities in other web applications within their infrastructure. The vulnerability highlights the critical importance of maintaining up-to-date software versions and proper input validation practices in preventing web-based attacks.