CVE-2006-5827 in phpComasy
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in index.php in phpComasy CMS 0.7.9pre and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) username or (2) password parameters.
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Analysis
by VulDB Data Team • 04/27/2026
The vulnerability identified as CVE-2006-5827 represents a critical cross-site scripting flaw within the phpComasy Content Management System version 0.7.9pre and earlier installations. This vulnerability resides in the index.php script and exposes the system to remote code execution through malicious web script injection. The flaw specifically affects two input parameters namely username and password, which are processed without adequate sanitization or output encoding mechanisms. Attackers can exploit this weakness by submitting crafted malicious payloads through these parameters, potentially compromising user sessions and executing unauthorized commands on behalf of victims.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the phpComasy framework. When user-provided data enters the system through the username or password fields, the application fails to properly sanitize or escape the input before rendering it in web responses. This creates an environment where malicious scripts can be injected and subsequently executed in the context of other users' browsers. The vulnerability aligns with CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications, where improper validation of user-supplied data leads to script execution in victim browsers.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. Attackers can leverage the XSS capability to perform various malicious activities including but not limited to cookie theft, redirecting users to phishing sites, defacing web pages, or even establishing persistent backdoors within the compromised system. The remote nature of this attack means that exploitation does not require physical access to the system, making it particularly dangerous for web applications handling sensitive user information. Users who authenticate through the vulnerable system become potential victims of these attacks, as their browsers execute the injected scripts without proper security boundaries.
Organizations utilizing phpComasy CMS versions 0.7.9pre or earlier face significant security risks from this vulnerability. The attack surface is broad since authentication forms are typically accessible to all users and the impact affects the entire user base that interacts with the system. Mitigation strategies should include immediate patching of the CMS to a secure version that addresses the input validation issues. Additionally, implementing proper output encoding for all user-supplied data, enforcing strict input validation rules, and deploying web application firewalls can provide layered defense mechanisms. The vulnerability also highlights the importance of following secure coding practices such as those recommended by the OWASP Top Ten project and aligns with ATT&CK technique T1566 which covers credential access through various injection methods including XSS attacks that can lead to privilege escalation and persistent access to systems.