CVE-2023-49707 in S5 Register Module
Summary
by MITRE • 12/14/2023
SQLi vulnerability in S5 Register module for Joomla.
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Analysis
by VulDB Data Team • 01/10/2024
The SQL injection vulnerability in the S5 Register module for Joomla represents a critical security flaw that allows attackers to execute arbitrary database commands through improperly sanitized input parameters. This vulnerability resides within the module's handling of user registration data, specifically in the way it processes and incorporates user-supplied information into database queries without adequate validation or sanitization measures.
The technical implementation of this flaw involves the S5 Register module failing to properly escape or parameterize user inputs when constructing SQL statements for database operations during the registration process. Attackers can exploit this by manipulating input fields such as username, email address, or other registration parameters to inject malicious SQL code that gets executed within the database context. The vulnerability typically manifests when the application directly concatenates user input into SQL queries instead of utilizing prepared statements or proper input sanitization techniques.
From an operational perspective, this vulnerability poses significant risks to Joomla sites using the S5 Register module, as successful exploitation can lead to complete database compromise including data theft, unauthorized account creation, privilege escalation, and potential backdoor installation. The attack surface is particularly concerning because user registration forms are frequently accessed and often contain sensitive information that attackers can leverage for further system penetration. Security researchers have identified this vulnerability as a prime target for automated scanning tools due to its predictable exploitation patterns and the widespread use of Joomla CMS platforms.
The impact extends beyond immediate data compromise, as attackers can potentially extract administrative credentials, modify user permissions, or even gain access to sensitive configuration files stored within the database. This vulnerability aligns with CWE-89 which specifically addresses SQL injection flaws in software applications, and represents a clear violation of secure coding practices that should be enforced through input validation and parameterized query execution. The threat landscape for this vulnerability is further amplified by its presence in widely deployed CMS modules, making it attractive to both automated exploit frameworks and targeted attack groups.
Organizations should immediately update to the latest version of the S5 Register module where available, implement proper input validation at multiple layers including web application firewall rules, and conduct thorough security assessments of their Joomla installations. The mitigation strategy should include disabling unnecessary registration features, implementing rate limiting on registration attempts, and monitoring database access logs for suspicious activities. Additionally, security teams should consider implementing database query auditing and privilege separation to minimize potential damage from successful exploitation attempts. This vulnerability serves as a reminder of the critical importance of secure coding practices and regular security updates in preventing widespread compromise of web applications.