CVE-2018-10206 is a security vulnerability identified in Vaultize Enterprise File Sharing version 17.05.31. The issue is a Stored Cross-Site Scripting (XSS) vulnerability that occurs via the optional message field of a file request. Stored XSS vulnerabilities arise when an attacker is able to inject malicious scripts into a web application that are then permanently stored on the server and subsequently executed in the browsers of users who access the affected content. In this case, the optional message field in the file request feature of Vaultize Enterprise File Sharing does not properly sanitize or encode user-supplied input, allowing an attacker to embed malicious JavaScript code. When other users view or interact with the file request containing the malicious message, the injected script executes in their browsers with the privileges of the web application. This can lead to session hijacking, credential theft, unauthorized actions on behalf of the user, or the delivery of further malware. The vulnerability does not require authentication to exploit if the file request feature is publicly accessible, but this depends on the deployment configuration. No CVSS score is provided, and no known exploits in the wild have been reported. Vaultize Enterprise File Sharing is an enterprise-grade file sharing and collaboration platform, often used by organizations to securely share sensitive documents internally and externally. The vulnerability thus poses a risk to confidentiality and integrity of user sessions and data, as well as availability if exploited to perform denial-of-service attacks via script execution loops or resource exhaustion.

For European organizations using Vaultize Enterprise File Sharing 17.05.31, this vulnerability could lead to significant security risks. Attackers exploiting the Stored XSS could steal user credentials or session tokens, enabling unauthorized access to sensitive corporate data. This is particularly critical in sectors with strict data protection regulations such as GDPR, where data breaches can lead to heavy fines and reputational damage. The ability to execute arbitrary scripts also opens the door to phishing attacks, malware distribution, and manipulation of file sharing workflows, potentially disrupting business operations. Since Vaultize is used for enterprise file sharing, the compromise of user accounts or sessions could expose confidential documents or intellectual property. Additionally, if the file request feature is accessible externally, attackers could target a broad range of users, increasing the scope of impact. The vulnerability could also be leveraged as a foothold for further network intrusion or lateral movement within an organization’s IT environment.

To mitigate this vulnerability, organizations should first apply any available patches or updates from Vaultize that address the Stored XSS issue. If no patch is available, administrators should consider disabling or restricting access to the file request feature, especially from external or untrusted networks. Input validation and output encoding should be enforced on the optional message field to sanitize user input and prevent script injection. Web Application Firewalls (WAFs) can be configured to detect and block common XSS attack patterns targeting the file request endpoint. User education on phishing and suspicious links is also important since attackers may leverage XSS to deliver malicious payloads. Regular security assessments and penetration testing of the Vaultize deployment can help identify residual risks. Monitoring logs for unusual activity related to file requests or user sessions can provide early detection of exploitation attempts. Finally, organizations should review and enforce least privilege access controls to limit the potential damage from compromised accounts.