CVE-2009-4719 in Discloser
Summary
by MITRE
SQL injection vulnerability in index.php in Discloser 0.0.4 rc2 allows remote attackers to execute arbitrary SQL commands via the more parameter.
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Analysis
by VulDB Data Team • 05/02/2026
The vulnerability identified as CVE-2009-4719 represents a critical SQL injection flaw within the Discloser content management system version 0.0.4 rc2. This vulnerability specifically affects the index.php script and manifests through the improper handling of the 'more' parameter, creating a pathway for remote attackers to execute arbitrary SQL commands against the underlying database. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before incorporating it into SQL query structures. This vulnerability falls under the Common Weakness Enumeration category CWE-89, which specifically addresses SQL injection weaknesses in software applications. The security implications are severe as attackers can leverage this vulnerability to bypass authentication mechanisms, extract sensitive data, modify database contents, or even escalate privileges within the affected system. The Discloser 0.0.4 rc2 version represents an older release that likely lacks modern security hardening practices and proper parameterized query implementations that would typically prevent such injection attacks.
The technical exploitation of this vulnerability occurs when an attacker submits malicious input through the 'more' parameter in the index.php script. The application fails to validate or sanitize this input before using it in SQL query construction, allowing attackers to inject malicious SQL code that gets executed by the database engine. This type of attack aligns with the tactics described in the MITRE ATT&CK framework under the technique T1071.004 for application layer protocol manipulation. The vulnerability demonstrates poor input handling practices where user data is directly concatenated into SQL statements rather than being properly parameterized or escaped. Attackers can potentially leverage this flaw to perform unauthorized database operations including but not limited to data extraction, modification, or deletion of sensitive information stored within the application's database. The impact extends beyond simple data theft as successful exploitation could lead to complete system compromise and unauthorized access to all data managed by the Discloser application.
The operational impact of CVE-2009-4719 poses significant risks to organizations utilizing the Discloser 0.0.4 rc2 platform. Remote attackers can exploit this vulnerability without requiring any prior authentication or access privileges, making it particularly dangerous as it allows for immediate exploitation from any network location. The vulnerability affects the core functionality of the content management system, potentially compromising all content managed through the application, user credentials, and other sensitive information stored in the database. Organizations running this version of Discloser face immediate security risks including data breaches, unauthorized content modification, and potential service disruption. The vulnerability also demonstrates the importance of keeping software components updated, as this issue would likely have been resolved in subsequent releases through proper input validation and sanitization measures. System administrators should consider the broader implications for their security posture, as exploitation of this vulnerability could provide attackers with a foothold for further network exploration and lateral movement within the organization's infrastructure. The vulnerability's classification as a remote code execution vector through database manipulation aligns with ATT&CK technique T1041 for data manipulation and T1071.004 for application layer protocol manipulation, emphasizing the multi-faceted nature of the security threat.
Mitigation strategies for CVE-2009-4719 should prioritize immediate remediation through software updates and patches provided by the vendor or through the implementation of proper input validation measures. Organizations should implement parameterized queries or prepared statements in all database interactions to prevent SQL injection vulnerabilities from occurring. Input validation should be implemented at multiple layers including application-level filtering and database-level protections. Network segmentation and access controls can provide additional defense-in-depth measures to limit the potential impact of successful exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar vulnerabilities within the application stack. The implementation of web application firewalls and intrusion detection systems can help detect and prevent exploitation attempts targeting this specific vulnerability. Additionally, organizations should establish secure coding practices and conduct regular security training for development teams to prevent similar vulnerabilities from being introduced in future software releases. The vulnerability highlights the critical need for proper security testing and code review processes that should include automated scanning tools and manual penetration testing to identify SQL injection vulnerabilities before they can be exploited by malicious actors.