CVE-2025-15070 in Web Fax
Summary
by MITRE • 12/29/2025
Exposure of Sensitive Information to an Unauthorized Actor, Missing Authorization vulnerability in Gmission Web Fax allows Authentication Abuse.
This issue affects Web Fax: from 3.0 before 3.0.1
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Analysis
by VulDB Data Team • 05/20/2026
The vulnerability identified as CVE-2025-15070 represents a critical exposure of sensitive information through missing authorization controls within the Gmission Web Fax application. This authentication abuse vulnerability stems from inadequate access controls that permit unauthorized actors to gain access to confidential data without proper authentication. The issue specifically impacts versions of Web Fax ranging from 3.0 through all versions prior to 3.0.1, indicating a regression or oversight in the authorization mechanisms that should have been implemented in the software release cycle. This type of vulnerability falls under the CWE-284 access control weakness category, where the system fails to properly enforce authorization policies that should restrict access to sensitive resources based on user credentials and privileges.
The technical flaw manifests as a failure in the application's authentication framework where sensitive information remains accessible to users who have not properly authenticated or authorized within the system. This exposure occurs at the application layer where the Web Fax service fails to validate user permissions before granting access to confidential data streams, user accounts, or system configuration details. The vulnerability represents a fundamental breakdown in the principle of least privilege, where users may access data beyond their intended scope of authorization. Attackers can exploit this weakness to bypass normal authentication procedures and directly access sensitive fax data, user credentials, or system administrative functions that should be restricted to authorized personnel only.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential system compromise and data breach scenarios. Unauthorized access to fax systems can lead to exposure of sensitive business communications, personal data, or confidential documents that may contain proprietary information, financial records, or personally identifiable information. This vulnerability creates opportunities for attackers to conduct reconnaissance activities, gather intelligence about the organization's operations, or escalate privileges to gain deeper system access. The attack surface expands significantly as the vulnerability allows unauthorized actors to access not just basic fax functionality but potentially administrative controls that could enable further exploitation. According to ATT&CK framework, this vulnerability maps to T1566 initial access techniques where attackers can leverage weak authentication mechanisms to establish unauthorized access to network resources.
Mitigation strategies for CVE-2025-15070 require immediate implementation of the patched version 3.0.1 which should contain proper authorization controls and authentication enforcement mechanisms. Organizations should conduct comprehensive vulnerability assessments to identify any unauthorized access that may have occurred prior to patching, particularly focusing on audit logs and access records for the affected Web Fax system. System administrators should implement additional monitoring controls to detect unusual access patterns or unauthorized attempts to access fax system resources. The remediation process should include reviewing and strengthening authentication policies, implementing multi-factor authentication where possible, and ensuring that all user accounts have appropriate access controls based on their roles and responsibilities. Network segmentation strategies should be employed to limit access to fax systems to authorized users only, and regular security audits should verify that authorization controls remain effective against similar vulnerabilities in the future.