CVE-2018-6580 in Jimtawl
Summary
by MITRE
Arbitrary file upload exists in the Jimtawl 2.1.6 and 2.2.5 component for Joomla! via a view=upload&task=upload&pop=true&tmpl=component request.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2018-6580 represents a critical arbitrary file upload flaw within the Jimtawl component for Joomla! versions 2.1.6 and 2.2.5. This vulnerability resides in the component's file upload functionality and can be exploited through a specific request pattern involving the parameters view=upload&task=upload&pop=true&tmpl=component. The flaw allows authenticated attackers with sufficient privileges to upload malicious files to the target system, potentially leading to remote code execution and complete system compromise. The vulnerability stems from inadequate input validation and sanitization within the file upload handler, which fails to properly verify file types and contents before processing uploads.
The technical implementation of this vulnerability follows the CWE-434 standard for insecure file upload, where the application accepts files without proper validation mechanisms. Attackers can leverage this weakness by crafting malicious payloads that bypass the intended file type restrictions, often exploiting the component's lack of proper file extension checking and content type verification. The specific request structure targets the component's upload interface, where the tmpl=component parameter suggests the application is designed to handle AJAX-style uploads, making it particularly susceptible to exploitation through web-based attacks. The vulnerability operates at the application layer and requires minimal privileges to exploit, typically involving users with upload permissions within the Joomla! administration interface.
The operational impact of this vulnerability extends beyond simple unauthorized file uploads, as it can enable attackers to establish persistent backdoors, deploy web shells, or execute arbitrary code on the compromised server. This capability directly aligns with ATT&CK technique T1106 for execution through valid accounts, where legitimate user credentials are used to perform malicious activities. The vulnerability creates a persistent threat vector that can be leveraged for data exfiltration, privilege escalation, and further network infiltration. Organizations running vulnerable versions of the Jimtawl component face significant risk of complete system compromise, with potential impacts including data breaches, service disruption, and compliance violations.
Mitigation strategies for CVE-2018-6580 require immediate action including the upgrade to patched versions of the Jimtawl component, which should implement proper input validation and file type restrictions. Organizations should also implement additional security controls such as restricting upload permissions to minimal necessary accounts, implementing file content analysis, and deploying web application firewalls to detect and block malicious upload attempts. The vulnerability demonstrates the importance of proper secure coding practices and input validation as outlined in OWASP Top 10 A01:2021. Regular security assessments and vulnerability scanning should be conducted to identify similar flaws in other components, while access control measures should be strengthened to limit the potential impact of such vulnerabilities. The affected Joomla! installations must also implement proper file upload restrictions and validate all uploaded content against strict security policies to prevent exploitation of similar weaknesses.