CVE-2018-6575 in JEXTN Classified
Summary
by MITRE
SQL Injection exists in the JEXTN Classified 1.0.0 component for Joomla! via a view=boutique&sid= request.
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Analysis
by VulDB Data Team • 06/15/2025
The CVE-2018-6575 vulnerability represents a critical sql injection flaw within the JEXTN Classified 1.0.0 extension for the Joomla! content management system. This vulnerability specifically manifests when processing requests with the parameters view=boutique&sid= which indicates that the application fails to properly sanitize user input before incorporating it into database queries. The flaw exists in the backend processing logic where the sid parameter is directly used in sql statements without adequate validation or escaping mechanisms. This type of vulnerability falls under the common weakness enumeration CWE-89 which categorizes sql injection as a severe security weakness that allows attackers to manipulate database queries through malicious input.
The operational impact of this vulnerability is substantial as it provides attackers with unauthorized access to the underlying database system. An attacker can exploit this flaw to extract sensitive information including user credentials, personal data, and administrative details stored within the classifieds database. The vulnerability enables a range of malicious activities including data exfiltration, database enumeration, and potentially full system compromise. Attackers can leverage this weakness to execute arbitrary sql commands which may lead to privilege escalation or complete database takeover. The attack surface is particularly concerning because joomla! extensions often have direct database access permissions and the vulnerability affects a widely deployed classifieds solution.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1071.004 which covers application layer protocol manipulation and T1046 which involves network service scanning. The attack vector typically involves sending crafted http requests containing malicious sql payloads through the boutique view parameter. This vulnerability demonstrates poor input validation practices and highlights the importance of implementing proper parameterized queries or prepared statements. Security controls such as web application firewalls and input sanitization mechanisms could potentially mitigate the impact, though the most effective remediation requires immediate code patching and proper database query sanitization.
The remediation approach for CVE-2018-6575 involves immediate patching of the affected JEXTN Classified extension to version 1.0.1 or later which addresses the sql injection vulnerability through proper input validation and parameterized query implementation. Organizations should also implement comprehensive input sanitization routines that validate and escape all user-supplied data before database processing. Database administrators should review and restrict database user permissions to minimize potential impact from successful exploitation attempts. Security monitoring should be enhanced to detect unusual database query patterns and malformed requests that may indicate exploitation attempts. Additionally, regular security assessments of third-party joomla! extensions are crucial to identify similar vulnerabilities and maintain overall system security posture. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for continuous security testing of web applications and their components.