CVE-2018-10210 is a vulnerability identified in Vaultize Enterprise File Sharing version 17.05.31. The issue allows an attacker to enumerate valid users through the password-reset feature. Specifically, the password-reset functionality leaks information that can be used to confirm whether a given username or email address exists in the system. This type of vulnerability is commonly referred to as a user enumeration flaw. It arises when the application responds differently to password reset requests depending on whether the user exists or not, enabling attackers to systematically test and identify valid user accounts. Although the vulnerability does not directly allow unauthorized access or code execution, it facilitates reconnaissance activities that can be leveraged in subsequent attacks such as targeted phishing, brute force, or credential stuffing. The vulnerability was published in April 2018 and no CVSS score has been assigned. There are no known exploits in the wild, and no patches or vendor advisories are referenced in the provided information. The affected product is Vaultize Enterprise File Sharing, a solution used for secure file sharing and collaboration, typically in enterprise environments. The lack of detailed vendor or product information limits the scope of technical specifics, but the core issue remains a classic user enumeration via password reset mechanism.

For European organizations using Vaultize Enterprise File Sharing 17.05.31, this vulnerability poses a moderate security risk. User enumeration can significantly aid attackers in mapping out valid user accounts within an organization, which is a critical first step in targeted attacks. Once valid users are identified, attackers can launch phishing campaigns tailored to those users or attempt password guessing and credential stuffing attacks. This can lead to unauthorized access to sensitive files and data, potentially resulting in data breaches, intellectual property theft, or compliance violations under regulations such as GDPR. While the vulnerability itself does not grant direct access or compromise system integrity, it lowers the barrier for attackers to conduct more effective social engineering or brute force attacks. Enterprises relying on Vaultize for secure file sharing should be aware that their user base could be exposed to enumeration, increasing the risk of account compromise and subsequent data leakage or disruption of services.

To mitigate this vulnerability, organizations should implement the following specific measures: 1) Modify the password-reset feature to provide generic, non-distinguishing responses regardless of whether the user exists or not. For example, always respond with a message like 'If the email is registered, you will receive a reset link,' to avoid revealing user existence. 2) Implement rate limiting and CAPTCHA challenges on password reset requests to prevent automated enumeration attempts. 3) Monitor logs for unusual password reset activity that may indicate enumeration attempts. 4) Encourage or enforce multi-factor authentication (MFA) for user accounts to reduce the impact of compromised credentials obtained through enumeration-assisted attacks. 5) If possible, upgrade to a newer version of Vaultize Enterprise File Sharing where this issue is addressed or apply vendor patches once available. 6) Conduct user awareness training to help users recognize phishing attempts that may follow enumeration. These targeted mitigations go beyond generic advice by focusing on hardening the password reset workflow and detecting enumeration behaviors.