CVE-2025-30516 in Mobile Apps
Summary
by MITRE • 04/14/2025
Mattermost Mobile Apps versions <=2.25.0 fail to terminate sessions during logout under certain conditions (e.g. poor connectivity), allowing unauthorized users on shared devices to access sensitive notification content via continued mobile notifications
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Analysis
by VulDB Data Team • 09/24/2025
The vulnerability identified as CVE-2025-30516 affects Mattermost mobile applications versions 2.25.0 and earlier, presenting a critical session management flaw that undermines the security of mobile device access. This issue manifests when users attempt to log out of the application but the session termination process fails due to specific network conditions or connectivity issues. The flaw represents a fundamental breakdown in the application's authentication lifecycle management, where the system fails to properly invalidate user sessions during the logout sequence. This creates a persistent security risk that extends beyond the immediate logout action, potentially allowing unauthorized access to sensitive data through continued notification delivery mechanisms.
The technical implementation of this vulnerability stems from inadequate session handling within the mobile application's authentication framework. When network connectivity is poor or unstable during logout operations, the application fails to properly communicate session invalidation signals to the server component, resulting in lingering session states that remain active despite user logout actions. This improper session termination creates a window of opportunity for unauthorized individuals to access notification content that would normally be restricted to authenticated users. The flaw specifically impacts the mobile notification subsystem, where push notifications continue to deliver sensitive content even after logout has been initiated, effectively bypassing the intended access controls.
The operational impact of this vulnerability extends beyond simple unauthorized data access to encompass broader security implications for shared device environments. In scenarios where multiple users share mobile devices, particularly in enterprise or healthcare settings, this flaw creates persistent access vectors that could expose confidential communications, personal data, or sensitive business information. The vulnerability is particularly concerning because it operates silently in the background, with users potentially unaware that their session remains active while continuing to receive notifications. This creates a false sense of security for legitimate users while simultaneously providing unauthorized access to sensitive information through notification content that may include private messages, system alerts, or other confidential data.
Organizations utilizing Mattermost mobile applications must implement immediate mitigations to address this vulnerability, including updating to versions 2.25.1 or later where the session termination issue has been resolved. System administrators should conduct thorough security assessments of mobile device management policies, particularly regarding shared device usage and session handling procedures. The vulnerability aligns with CWE-613, which addresses insufficient session expiration, and demonstrates characteristics consistent with ATT&CK technique T1531, focusing on credential access through session management flaws. Additional protective measures include implementing network monitoring for abnormal session termination patterns and establishing user education programs about proper logout procedures, particularly in shared device environments where the risk of unauthorized access is heightened. Organizations should also consider implementing additional access controls such as device encryption, biometric authentication, and automatic session timeouts to minimize the window of opportunity for exploitation.