CVE-2025-41459 is a high-severity vulnerability identified in Two App Studio's Journey application version 5.5.6 on iOS platforms. The core issue stems from improper authentication mechanisms (CWE-287) within the app's local authentication component. Specifically, the vulnerability arises due to insufficient protections against brute-force attacks and runtime manipulation. This allows a local attacker—someone with physical or local access to the device—to bypass biometric and PIN-based access controls. The attack vectors include repeated PIN entry attempts without effective lockout or throttling, and dynamic code injection techniques that manipulate the authentication logic at runtime. The CVSS 3.1 score of 7.8 reflects the vulnerability's high impact on confidentiality, integrity, and availability, with low attack complexity but requiring low privileges and no user interaction. The vulnerability affects the confidentiality of sensitive user data protected by the app, the integrity of authentication mechanisms, and potentially the availability if the app's security controls are compromised. No patches or known exploits in the wild have been reported as of the publication date (July 21, 2025).

For European organizations, especially those using the Journey app for sensitive personal or business data management on iOS devices, this vulnerability poses significant risks. An attacker with local device access could bypass biometric or PIN protections, potentially exposing confidential information or enabling unauthorized actions within the app. This could lead to data breaches, loss of user trust, and compliance violations under regulations such as GDPR. The impact is particularly critical for sectors handling sensitive personal data, including finance, healthcare, and legal services. Additionally, compromised devices could serve as entry points for broader network attacks if the app integrates with enterprise systems. Given the local nature of the attack, the threat is more pronounced in environments where devices are shared, lost, or stolen, or where insider threats exist.

To mitigate this vulnerability, European organizations should: 1) Immediately assess the use of Two App Studio Journey 5.5.6 on iOS devices within their environment and restrict its use if possible until a patch is available. 2) Implement device-level security controls such as strong iOS passcodes, device encryption, and enable remote wipe capabilities to reduce risks from lost or stolen devices. 3) Employ Mobile Device Management (MDM) solutions to enforce security policies, monitor app usage, and restrict installation of vulnerable app versions. 4) Educate users on the risks of local device access and encourage vigilance against physical device compromise. 5) Monitor for updates or patches from Two App Studio and apply them promptly once released. 6) Consider additional application-level protections such as multi-factor authentication external to the vulnerable app if feasible. 7) Conduct regular security audits and penetration testing focusing on local authentication mechanisms and runtime code integrity on iOS devices.