CVE-2009-4927 in WBNEWS
Summary
by MITRE
WB News 2.1.2 allows remote attackers to bypass authentication and gain administrative access via a modified WBNEWS cookie, as demonstrated by setting this cookie to 1.
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Analysis
by VulDB Data Team • 09/16/2025
The vulnerability identified as CVE-2009-4927 affects WB News version 2.1.2, a content management system that suffered from a critical authentication bypass flaw. This weakness resides in how the application handles session management and privilege verification within its cookie-based authentication mechanism. The vulnerability specifically targets the WBNEWS cookie parameter that is used to determine administrative privileges within the application's access control system. When an attacker modifies this cookie value to 1, they can effectively escalate their privileges from a regular user to an administrator without proper authentication credentials.
The technical implementation of this vulnerability stems from inadequate input validation and privilege checking within the application's authentication flow. The WBNEWS cookie serves as a simple flag mechanism to indicate administrative status, where a value of 1 signifies administrator access while other values represent standard user privileges. However, the application fails to properly validate or verify the authenticity of this cookie value before granting administrative access. This design flaw creates a direct path for attackers to manipulate session state and bypass the intended authentication controls that should prevent unauthorized administrative access. The vulnerability represents a classic case of insufficient access control validation, where user-controllable input directly influences privilege levels without proper authorization checks.
From an operational perspective, this vulnerability presents a severe risk to affected systems as it allows remote attackers to gain complete administrative control over the WB News application without requiring valid credentials or knowledge of user accounts. The attack vector is particularly dangerous because it requires no local access or complex exploitation techniques, making it accessible to attackers with minimal technical expertise. Once an attacker successfully manipulates the WBNEWS cookie to 1, they can perform any administrative function including user management, content modification, system configuration changes, and potentially access sensitive data stored within the application. This level of access can lead to complete system compromise, data exfiltration, and further lateral movement within network environments where the vulnerable application resides.
The vulnerability aligns with CWE-287, which addresses improper handling of authentication tokens, and demonstrates characteristics consistent with the attack pattern described in MITRE ATT&CK framework under T1078.004 for valid accounts and T1566 for credential harvesting. Organizations affected by this vulnerability should immediately implement mitigations including patching the application to version 2.1.3 or later, which contains the necessary authentication validation fixes. Additionally, network administrators should consider implementing web application firewalls to monitor and filter suspicious cookie modifications, while also enforcing strict access controls and monitoring for unusual administrative activities. The implementation of proper session management practices, including server-side session validation and secure cookie attributes such as HttpOnly and Secure flags, would also help prevent similar vulnerabilities from occurring in the future. Regular security audits and input validation testing should be conducted to identify and remediate similar privilege escalation issues in other applications within the organization's infrastructure.