CVE-2019-25758
Summary
by MITRE • 06/19/2026
Joomla! Component vBizz 1.0.7 contains an unrestricted file upload vulnerability that allows authenticated attackers to upload arbitrary PHP files by submitting malicious files through the profile_pic parameter. Attackers can upload PHP files via POST requests to the employee view endpoint and execute them from the uploads directory to achieve remote code execution.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/19/2026
The vulnerability in Joomla! Component vBizz 1.0.7 represents a critical security flaw that enables authenticated attackers to bypass file upload restrictions and execute arbitrary code on the target system. This issue stems from insufficient input validation and access control mechanisms within the component's file upload functionality, specifically affecting the profile_pic parameter in the employee view endpoint. The vulnerability falls under CWE-434 which categorizes unrestricted file upload as a significant weakness that can lead to remote code execution and full system compromise. Attackers exploiting this vulnerability can upload malicious PHP files through POST requests, leveraging the component's lack of proper file type validation and directory access controls.
The technical implementation of this vulnerability allows attackers to bypass security measures by submitting files with extensions that are not properly filtered or rejected. When the component processes the profile_pic parameter, it fails to validate the file content or enforce strict file type restrictions, enabling attackers to upload PHP scripts that can be executed within the web server's execution context. The uploaded files are stored in the uploads directory, providing attackers with a persistent execution environment where they can run malicious code with the privileges of the web server. This vulnerability demonstrates a classic lack of proper input sanitization and output encoding practices that are fundamental to secure web application development.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with a direct path to remote code execution and potential system compromise. Once an attacker successfully uploads a PHP payload, they can execute commands on the target system, potentially leading to data exfiltration, privilege escalation, and further network infiltration. The vulnerability affects the confidentiality, integrity, and availability of the affected Joomla components for business-critical applications.
Mitigation strategies for this vulnerability should include immediate patching of the vBizz component to version 1.0.8 or later, which addresses the unrestricted file upload issue through proper input validation and access controls. Organizations should implement strict file type validation mechanisms that reject executable file extensions and perform content-based file verification. The web server configuration should enforce proper directory permissions and restrict execution capabilities of upload directories. Additionally, implementing web application firewalls and security monitoring solutions can help detect and prevent exploitation attempts. This vulnerability aligns with ATT&CK technique T1190 which describes the use of untrusted inputs for code execution, and T1078 which covers legitimate credentials for persistence and privilege escalation. Regular security audits and vulnerability assessments should be conducted to identify similar issues in other components and ensure comprehensive protection against file upload vulnerabilities.