CVE-2025-67684 is a critical security vulnerability affecting OpenSolution's Quick.Cart e-commerce platform, specifically version 6.7. The flaw is categorized under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as a path traversal vulnerability. The issue occurs in the theme selection mechanism where privileged users can upload files. The system only validates the filename extension but fails to properly sanitize or restrict the file path, enabling attackers to upload arbitrary PHP files containing malicious code. Once uploaded, these files can be included and executed by the server, resulting in remote code execution (RCE). This vulnerability does not require user interaction or additional authentication beyond privileged user access, making exploitation straightforward if such access is obtained. The vendor was notified early but has not disclosed detailed information or provided patches, and only version 6.7 has been confirmed vulnerable. The CVSS 4.0 base score of 9.4 reflects the vulnerability's critical nature, with network attack vector, low attack complexity, no privileges required beyond privileged user access, and no user interaction needed. The impact spans confidentiality, integrity, and availability, as attackers can execute arbitrary code, potentially leading to full system compromise. No known exploits have been observed in the wild yet, but the vulnerability's characteristics make it a high-risk target for attackers.

For European organizations, especially those operating e-commerce platforms using Quick.Cart 6.7, this vulnerability poses a severe risk. Successful exploitation can lead to full system compromise, data breaches involving customer and transaction data, disruption of business operations, and potential financial losses. The ability to execute arbitrary code remotely can allow attackers to install backdoors, pivot within networks, or exfiltrate sensitive information. Given the critical CVSS score and the lack of vendor patches, organizations face increased exposure. The threat is particularly acute for companies with privileged users who have upload capabilities, as insider threats or compromised credentials could facilitate exploitation. The reputational damage and regulatory consequences under GDPR for data breaches further amplify the impact. Additionally, the vulnerability could be leveraged in supply chain attacks if Quick.Cart is integrated into larger platforms or services.

1. Immediately audit and restrict privileged user access to only those who require upload capabilities, enforcing the principle of least privilege. 2. Implement strict input validation and sanitization on file uploads, including verifying file contents beyond extensions, to prevent uploading executable code. 3. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious file upload patterns and path traversal attempts. 4. Monitor file system changes and web server logs for unusual activity indicative of exploitation attempts. 5. Isolate the Quick.Cart application environment using containerization or sandboxing to limit the blast radius of potential compromises. 6. Until an official patch is released, consider disabling the theme upload feature or replacing it with a safer alternative. 7. Regularly update and patch all related software components and dependencies to reduce attack surface. 8. Conduct security awareness training for privileged users to recognize phishing and credential compromise risks. 9. Prepare incident response plans specific to web application compromises involving RCE. 10. Engage with OpenSolution for updates and verify if newer versions address this vulnerability.