CVE-2025-15070 Overview
CVE-2025-15070 is an information disclosure and missing authorization vulnerability in Gmission Web Fax. The flaw affects versions from 3.0 before 3.0.1 and enables authentication abuse by an authenticated local actor. Successful exploitation exposes sensitive information to actors who should not have access to it. The vulnerability is tracked under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). No public proof-of-concept exploit, CISA KEV listing, or active exploitation has been reported at the time of publication.
Critical Impact
A low-privileged local user can abuse missing authorization checks in Web Fax to access sensitive information belonging to other users of the application.
Affected Products
- Gmission Web Fax 3.0
- Gmission Web Fax versions after 3.0 and prior to 3.0.1
- Fixed in Gmission Web Fax 3.0.1
Discovery Timeline
- 2025-12-29 - CVE-2025-15070 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-15070
Vulnerability Analysis
CVE-2025-15070 combines two related weaknesses in Gmission Web Fax. The application fails to enforce authorization checks on operations that return sensitive data. As a result, an authenticated actor can invoke functionality intended for other users or roles and receive information they are not entitled to view. The confidentiality impact is high, while integrity and availability of the system are not affected. The attack vector is local, meaning the attacker must already have valid low-privilege credentials or session access to the host running Web Fax.
Root Cause
The root cause is missing authorization enforcement paired with information exposure, as classified under CWE-200. Web Fax accepts requests from authenticated users without verifying that the caller is entitled to the requested resource. Because access decisions rely on authentication alone, any logged-in user can reach data owned by other users or by administrative functions.
Attack Vector
An attacker needs valid low-privilege credentials and local access to the Web Fax service. After authenticating, the attacker issues requests to endpoints or workflows that handle fax records, user data, or configuration. The application returns the requested content without performing per-object authorization checks. No user interaction is required, and attack complexity is low. See the Gmission product page for vendor-supplied product information.
No verified public exploit code is available for this vulnerability. Refer to the vendor advisory for technical specifics once released.
Detection Methods for CVE-2025-15070
Indicators of Compromise
- Authenticated Web Fax sessions accessing resources or record identifiers that fall outside the user's normal scope.
- Repeated sequential enumeration of object identifiers (for example, fax IDs or user IDs) from a single account.
- Unusual volume of read operations against sensitive endpoints from low-privileged accounts.
Detection Strategies
- Review Web Fax application logs for requests where the authenticated user identifier does not match the owner of the returned resource.
- Correlate authentication events with subsequent data access events to identify horizontal privilege abuse patterns.
- Baseline normal API and page access patterns per user role, then alert on deviations that indicate cross-tenant or cross-user reads.
Monitoring Recommendations
- Enable verbose access logging on the Web Fax service and forward events to a centralized SIEM or data lake for correlation.
- Monitor host-level activity on the Web Fax server for anomalous local account behavior, since the attack vector is local.
- Alert on any change to the Web Fax binary, configuration, or version string that deviates from the approved 3.0.1 build.
How to Mitigate CVE-2025-15070
Immediate Actions Required
- Upgrade Gmission Web Fax to version 3.0.1 or later, which contains the vendor fix.
- Audit existing Web Fax user accounts and revoke credentials that are no longer required.
- Review recent access logs for signs of unauthorized data access prior to patching.
Patch Information
Gmission has addressed the vulnerability in Web Fax version 3.0.1. Administrators should coordinate with Gmission for the update package and verify the installed version after upgrade. Consult the Gmission Web Fax product page for release information and vendor contact details.
Workarounds
- Restrict network and local access to the Web Fax host so only trusted administrators can reach the application until the patch is deployed.
- Enforce least-privilege on operating system accounts that can authenticate to Web Fax.
- Segment the Web Fax server from general user workstations and business networks using firewall rules or host isolation.
No vendor-supplied configuration example is available. Apply access restrictions using the operating system and network controls already in use in your environment.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
