CVE-2025-21079 in Members
Summary
by MITRE • 11/05/2025
Improper input validation in Samsung Members prior to version 5.5.01.3 allows remote attackers to connect arbitrary URL and launch arbitrary activity with Samsung Members privilege. User interaction is required for triggering this vulnerability.
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Analysis
by VulDB Data Team • 11/08/2025
The vulnerability identified as CVE-2025-21079 represents a critical input validation flaw within Samsung Members application prior to version 5.5.01.3. This security weakness stems from insufficient sanitization of user-provided input parameters that are subsequently processed by the application's intent handling mechanisms. The vulnerability specifically affects the application's ability to properly validate and sanitize URLs and activity launch requests that are passed through the Samsung Members platform. Attackers can exploit this weakness by crafting malicious URLs that, when processed by the vulnerable application, trigger unintended behavior. The flaw operates at the application level where user input is directly used to construct and execute system calls without proper validation or sanitization.
The technical implementation of this vulnerability involves the application's handling of intent parameters and URL schemes that are commonly used for deep linking within Android applications. When Samsung Members processes user-provided URLs, it fails to properly validate the input before using it to launch system activities or connect to external resources. This improper validation creates an opportunity for attackers to manipulate the application's behavior by injecting malicious parameters that bypass normal security controls. The vulnerability is classified under CWE-20 as "Improper Input Validation" and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: Python" and T1068 for "Exploitation for Privilege Escalation" within the attack framework.
The operational impact of this vulnerability extends beyond simple data manipulation as it allows attackers to execute arbitrary activities with the elevated privileges of the Samsung Members application. This privilege escalation capability means that an attacker who successfully exploits this vulnerability can potentially access sensitive user data, perform unauthorized operations, and gain deeper system access than would normally be permitted. The requirement for user interaction to trigger the vulnerability means that social engineering becomes a critical component of exploitation, where users must be convinced to click on malicious links or interact with compromised content. This user interaction requirement does not mitigate the severity of the vulnerability but rather makes it more challenging to detect and prevent.
The attack surface for this vulnerability encompasses any user of Samsung Members application who interacts with maliciously crafted URLs or content that triggers the vulnerable code path. The exploitation process typically involves sending phishing emails, creating malicious websites, or embedding harmful links in other applications that users might interact with. Once triggered, the vulnerability allows attackers to launch arbitrary activities that may include accessing sensitive user information, modifying application data, or even executing commands with elevated privileges. The Samsung Members application's role as a platform for various user services and its integration with Samsung's ecosystem makes this vulnerability particularly concerning as it could potentially provide attackers with access to multiple interconnected services.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms within the Samsung Members application. The recommended approach includes validating all user-provided input parameters before processing them, implementing strict URL scheme validation, and ensuring that all activity launches are properly authenticated and authorized. Organizations should also implement application-level protections such as intent filtering, proper URL parsing, and input sanitization routines that prevent malicious parameters from being processed. The vulnerability requires immediate patching through Samsung's official update channels, with users urged to upgrade to version 5.5.01.3 or later to receive the necessary security fixes. Additionally, security awareness training for users can help reduce the risk of successful exploitation through social engineering attacks that rely on user interaction to trigger the vulnerability.