CVE-2026-54372 in VitaFit
Summary
by MITRE • 11/04/2026
VitaFit Android application (com.vt.vitafit) before 2.8.1.0 contains an insecure TLS/SSL certificate validation vulnerability that allows network-based attackers to intercept and modify HTTPS traffic by exploiting a custom X509TrustManager that trusts all certificates and a hostname verifier that accepts any hostname. Attackers can perform a man-in-the-middle attack to capture account sessions and health-related API data, and use a captured session to delete the account's authentication record and prevent legitimate login.
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Analysis
by VulDB Data Team • 11/04/2026
The VitaFit Android application, specifically versions prior to 2.8.1.0, suffers from a critical insecure TLS certificate validation vulnerability that fundamentally compromises the integrity of network communications. This flaw stems from the implementation of a custom X509TrustManager and hostname verifier within the app's networking layer. Instead of validating certificates against trusted root authorities or checking for specific hostnames, these components are configured to trust all certificates regardless of their validity status and accept any hostname presented by the server. Consequently, the application fails to establish a secure channel with its backend services, leaving data in transit completely exposed to interception and modification by network-based attackers operating within range of the victim's device or on compromised network infrastructure.
From a technical perspective, this misconfiguration effectively disables Transport Layer Security protections for sensitive API calls. By trusting all certificates, the application ignores certificate chain validation errors such as expired dates, self-signed origins, or untrusted issuers. Similarly, by accepting any hostname, it bypasses checks that ensure the client is communicating with the intended server rather than an imposter. This allows attackers to perform a man-in-the-middle attack where they can position themselves between the mobile device and the VitaFit backend servers without triggering security warnings on the client side. The attacker can decrypt HTTPS traffic in real-time, gaining full visibility into the contents of requests and responses that are supposed to be encrypted.
The operational impact of this vulnerability is severe due to the sensitive nature of health-related data and account credentials handled by the application. Attackers who exploit this flaw can capture user session tokens, personal health metrics, and other private API data transmitted during normal usage. Beyond mere eavesdropping, the ability to modify traffic enables active manipulation of the communication stream. A particularly dangerous consequence highlighted in reports is the potential for attackers to use captured authentication records to delete an account's authentication record from the server side or manipulate session states. This can effectively lock out legitimate users by preventing them from logging into their accounts while allowing the attacker to maintain persistent access or disrupt service availability, constituting a significant denial of service and privacy violation.
This vulnerability aligns with CWE-295 Improper Certificate Validation and CWE-319 Cleartext Transmission of Sensitive Information within the Common Weakness Enumeration framework. In terms of adversary tactics, it facilitates MITM attacks as described in the ATT&CK technique T1078 Valid Accounts, where stolen credentials are used to maintain access, and potentially aligns with data interception methods found under network sniffing techniques. To mitigate this risk, developers must immediately update to version 2.8.1.0 or later which corrects these security flaws. For applications that cannot be updated instantly, implementing certificate pinning is a robust defense strategy that binds the app to specific public keys or certificates, ensuring that even if an attacker presents a valid but unauthorized certificate, the connection will be rejected. Additionally, enabling strict TLS validation settings and avoiding custom trust managers unless absolutely necessary with proper implementation of hostname verification are essential best practices for securing mobile applications against network-based interception attacks.