CVE-2008-4625 in Shifthis Newsletter
Summary
by MITRE
SQL injection vulnerability in stnl_iframe.php in the ShiftThis Newsletter (st_newsletter) plugin for WordPress allows remote attackers to execute arbitrary SQL commands via the newsletter parameter, a different vector than CVE-2008-0683.
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Analysis
by VulDB Data Team • 11/08/2024
The CVE-2008-4625 vulnerability represents a critical SQL injection flaw within the ShiftThis Newsletter plugin for WordPress, specifically affecting the stnl_iframe.php script. This vulnerability demonstrates the persistent nature of SQL injection attacks in content management systems where user input is inadequately sanitized before being incorporated into database queries. The flaw exists in the newsletter parameter handling mechanism, which allows malicious actors to inject arbitrary SQL commands directly into the application's database layer. Unlike CVE-2008-0683 which targeted different components, this vulnerability specifically exploits the iframe rendering functionality of the newsletter plugin, creating a unique attack vector that leverages the plugin's legitimate data processing capabilities for malicious purposes. The vulnerability falls under CWE-89 which categorizes SQL injection flaws as weaknesses in software that allows attackers to manipulate database queries through untrusted input.
The technical implementation of this vulnerability occurs when the stnl_iframe.php script processes the newsletter parameter without proper input validation or parameterized query construction. Attackers can craft malicious payloads that, when submitted through the newsletter parameter, bypass the application's normal input sanitization processes and directly manipulate the underlying database operations. This allows for unauthorized data access, modification, or deletion, potentially leading to complete database compromise. The attack surface is particularly concerning because it operates through the iframe rendering mechanism, which means that even users who do not directly interact with the plugin's administrative interface can be affected through crafted malicious links or embedded content. The vulnerability's exploitation requires minimal privileges and can be executed remotely, making it particularly dangerous in web environments where plugins are widely deployed.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to escalate privileges within the WordPress environment and potentially gain access to administrative accounts. Successful exploitation could result in complete website compromise, data exfiltration, and the potential for further lateral movement within network infrastructure that relies on compromised WordPress installations. The vulnerability's presence in a widely used plugin like ShiftThis Newsletter means that numerous websites could be affected simultaneously, creating a significant risk for organizations that have not implemented proper security measures. The attack vector through iframe rendering also complicates detection and mitigation efforts, as malicious activity may appear legitimate to standard security monitoring tools. This vulnerability directly aligns with attack techniques described in the MITRE ATT&CK framework under the T1071.004 sub-technique for application layer protocol tunneling, where attackers exploit legitimate application functionality to hide malicious activity.
Mitigation strategies for CVE-2008-4625 should include immediate plugin updates to versions that address the SQL injection vulnerability, along with implementing proper input validation and parameterized queries throughout the WordPress environment. Organizations should deploy web application firewalls to detect and block malicious SQL injection attempts, and conduct comprehensive security audits of all installed plugins to identify similar vulnerabilities. The implementation of proper database access controls and regular security monitoring can help detect unauthorized database access attempts. Additionally, maintaining up-to-date security patches for WordPress core and all plugins ensures that known vulnerabilities are addressed promptly. Security teams should also implement network segmentation and access controls to limit the potential damage from successful exploitation, while maintaining detailed logging of database activities to facilitate forensic analysis if compromise occurs. The vulnerability serves as a reminder of the critical importance of input validation and the need for continuous security assessment of web applications and their components.