CVE-2006-5127 in ConPresso
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Bartels Schoene ConPresso before 4.0.5a allow remote attackers to inject arbitrary web script or HTML via (1) the nr parameter in detail.php, (2) the msg parameter in db_mysql.inc.php, and (3) the pos parameter in index.php.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5127 represents a critical cross-site scripting flaw affecting Bartels Schoene ConPresso versions prior to 4.0.5a. This weakness exposes the application to remote code execution through malicious script injection, potentially compromising user sessions and data integrity. The vulnerability stems from insufficient input validation and sanitization mechanisms within three distinct script files, creating multiple attack vectors that adversaries can exploit to inject malicious payloads into the web application's response. The affected parameters include the nr parameter in detail.php, the msg parameter in db_mysql.inc.php, and the pos parameter in index.php, each representing separate entry points for XSS exploitation.
The technical implementation of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. This classification indicates that the application fails to properly validate or sanitize user-supplied input before incorporating it into dynamically generated web pages. The flaw operates by accepting unfiltered parameters and directly embedding them into HTML output without appropriate encoding or escaping mechanisms. Attackers can leverage these entry points to inject malicious JavaScript code that executes in the context of other users' browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability demonstrates poor input handling practices that violate fundamental web security principles.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling sophisticated attacks such as credential harvesting, session manipulation, and data exfiltration. When exploited, the XSS vulnerabilities could allow attackers to steal cookies, modify page content, redirect users to phishing sites, or execute arbitrary commands on affected systems. The three distinct attack vectors provide multiple opportunities for exploitation, increasing the likelihood of successful compromise. Users interacting with the vulnerable ConPresso application may unknowingly execute malicious code, leading to unauthorized access to sensitive information and potential system compromise. The vulnerability affects the core functionality of the content management system, undermining user trust and application security.
Mitigation strategies for CVE-2006-5127 require immediate implementation of input validation and output encoding measures across all affected script files. Organizations should upgrade to ConPresso version 4.0.5a or later, which includes proper parameter sanitization and validation mechanisms. The recommended approach involves implementing proper HTML escaping for all user-supplied input before rendering it in web pages, utilizing context-specific encoding for different output contexts. Additionally, implementing a Content Security Policy (CSP) can provide defense-in-depth against XSS attacks by restricting script execution and limiting the sources from which scripts can be loaded. Security headers should be configured to prevent script injection, and regular input validation should be enforced at multiple layers of the application. The remediation efforts should also include comprehensive code review to identify and address similar vulnerabilities in other parts of the application, following the ATT&CK framework's guidance on preventing and detecting web application vulnerabilities through proper input sanitization and output encoding practices.