CVE-2006-5986 in Extreme CMS
Summary
by MITRE
admin/options.php in Extreme CMS 0.9, and possibly earlier, does not require authentication, which might allow remote attackers to conduct unauthorized activities. NOTE: this issue can be combined with another vulnerability to expand the scope of a cross-site scripting (XSS) attack without authentication. NOTE: the provenance of this information is unknown; details are obtained from third party sources.
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Analysis
by VulDB Data Team • 04/28/2026
The vulnerability identified as CVE-2006-5986 affects Extreme CMS version 0.9 and potentially earlier versions, specifically targeting the admin/options.php file. This represents a critical authentication bypass flaw that fundamentally compromises the security architecture of the content management system. The absence of proper authentication requirements in the administrative interface creates an unauthorized access vector that allows remote attackers to execute administrative functions without proper credentials. This vulnerability directly violates fundamental security principles and represents a significant weakness in the application's access control mechanisms.
The technical implementation of this flaw stems from inadequate input validation and authentication checks within the administrative component of the CMS. The admin/options.php script fails to verify user credentials or session legitimacy before processing administrative requests, creating a persistent backdoor for malicious actors. This authentication bypass vulnerability can be categorized under CWE-287, which addresses improper authentication issues in software systems. The flaw operates at the application layer and affects the integrity and confidentiality of administrative functions, potentially allowing attackers to modify system configurations, manage users, or access sensitive data.
The operational impact of this vulnerability extends beyond simple unauthorized access, particularly when combined with cross-site scripting vulnerabilities. According to ATT&CK framework, this represents a privilege escalation technique that can be leveraged to expand attack surfaces and maintain persistent access. When combined with XSS vulnerabilities, attackers can exploit the authentication bypass to inject malicious scripts that persist across user sessions, enabling more sophisticated attacks such as session hijacking, data exfiltration, or further system compromise. The remote nature of this vulnerability means that attackers can exploit it from anywhere on the internet without requiring physical access or prior network presence.
The security implications of this vulnerability are severe as it undermines the entire administrative security model of the CMS. Attackers can manipulate system settings, potentially leading to complete system compromise or data breach incidents. The combination with XSS vulnerabilities creates a dangerous attack chain where initial authentication bypass leads to persistent script injection, allowing for long-term system infiltration. Organizations using affected versions of Extreme CMS face significant risk of unauthorized administrative access, which could result in complete system takeover, data loss, or service disruption. The vulnerability's classification under CWE-287 emphasizes the critical nature of proper authentication implementation in web applications.
Mitigation strategies should focus on immediate patching of the affected CMS version, implementing proper authentication controls, and conducting comprehensive security audits of administrative interfaces. Organizations should enforce strong access controls, implement proper session management, and ensure that all administrative functions require valid authentication before execution. Network segmentation and monitoring of administrative access attempts can provide additional layers of defense. The vulnerability highlights the importance of adhering to security best practices and proper authentication implementation as outlined in industry standards and frameworks. Regular security assessments and vulnerability scanning should be conducted to identify similar authentication bypass issues in other applications and systems.