CVE-2009-2181 in Campsite
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in admin-files/templates/list_dir.php in Campsite 3.3.0 RC1 allows remote attackers to inject arbitrary web script or HTML via the listbasedir parameter.
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Analysis
by VulDB Data Team • 03/05/2025
The vulnerability identified as CVE-2009-2181 represents a critical cross-site scripting flaw within the Campsite content management system version 3.3.0 RC1. This vulnerability specifically affects the admin-files/templates/list_dir.php component, which serves as a directory listing utility for administrators managing content files within the system. The flaw stems from insufficient input validation and sanitization of user-supplied data, creating an exploitable entry point for malicious actors seeking to compromise the administrative interface.
The technical implementation of this vulnerability occurs through the listbasedir parameter which is directly incorporated into the web page output without proper sanitization or encoding. When an attacker crafts a malicious payload and submits it through this parameter, the system fails to validate or escape the input before rendering it within the HTML context. This allows arbitrary JavaScript code or HTML content to be executed within the browser context of authenticated administrators who view the affected directory listing page. The vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws where untrusted data is improperly incorporated into web pages without adequate validation or encoding.
The operational impact of this vulnerability is severe as it enables attackers to execute malicious code within the administrative context of the Campsite system. An attacker could potentially steal administrator session cookies, redirect users to malicious websites, deface content management interfaces, or even escalate privileges within the system. The remote nature of the attack means that exploitation does not require local system access or physical presence, making it particularly dangerous for web applications that are publicly accessible. This vulnerability directly aligns with ATT&CK technique T1566 which covers social engineering attacks through malicious content delivery, and T1059 which addresses execution through scripting languages.
The exploitation process typically involves crafting a malicious URL containing encoded JavaScript payload within the listbasedir parameter and delivering it to an administrator who visits the affected page. The vulnerability affects the entire Campsite 3.3.0 RC1 release and likely impacts other versions that share similar code patterns in the directory listing functionality. Organizations using this version of Campsite face significant risk of unauthorized access to their content management systems, potentially leading to complete system compromise and data breaches.
Mitigation strategies should focus on immediate input validation and output encoding within the affected component. The recommended approach includes implementing strict parameter validation to reject suspicious characters and patterns, applying proper HTML encoding to all user-supplied data before rendering, and ensuring that the directory listing functionality properly sanitizes all input parameters. Additionally, implementing a web application firewall rule to filter out known malicious patterns in the listbasedir parameter would provide an additional layer of protection. Organizations should also consider upgrading to patched versions of Campsite, as this vulnerability was addressed in subsequent releases through proper input validation mechanisms and enhanced security controls that align with industry best practices for preventing XSS attacks.