CVE-2024-27855 is a vulnerability in Apple’s iOS and iPadOS operating systems that allows a crafted shortcut to access sensitive data without prompting the user for consent. Shortcuts are automation workflows that users can create or download to perform tasks on iOS and iPadOS devices. Normally, when a shortcut attempts to access sensitive data or perform sensitive actions, the system prompts the user for permission to prevent unauthorized access. However, due to insufficient security checks, a malicious shortcut can bypass these prompts and use sensitive data directly, potentially exposing confidential information or performing unauthorized actions. The vulnerability is classified under CWE-284 (Improper Access Control), indicating a failure to enforce proper authorization. Apple addressed this issue by implementing improved checks in iOS 16.7.8, iPadOS 16.7.8, iOS 17.5, iPadOS 17.5, macOS Sonoma 14.5, and macOS Ventura 13.6.7. The CVSS v3.1 score is 8.8 (high), reflecting the network attack vector, low attack complexity, no privileges required, but requiring user interaction to trigger the malicious shortcut. The impact includes high confidentiality, integrity, and availability consequences, as unauthorized data access and manipulation can occur. No public exploits have been reported yet, but the vulnerability poses a significant risk due to the widespread use of Apple devices and the powerful automation capabilities of shortcuts.

The vulnerability allows attackers to bypass user consent dialogs and access sensitive data on iOS and iPadOS devices, potentially leading to unauthorized disclosure of personal or corporate information. This can compromise user privacy, leak credentials, or expose confidential business data. The integrity of data and system state may also be affected if malicious shortcuts modify or delete information. Availability could be impacted if shortcuts perform disruptive actions without user knowledge. Organizations relying on Apple devices for communication, productivity, or sensitive operations face increased risk of data breaches and operational disruption. The ease of exploitation combined with the high impact on confidentiality and integrity makes this a critical concern for enterprises, government agencies, and individuals. The lack of known exploits in the wild reduces immediate risk but does not diminish the urgency of patching, as attackers may develop exploits rapidly once the vulnerability is public.

1. Immediately update all affected Apple devices to iOS 16.7.8, iPadOS 16.7.8, iOS 17.5, iPadOS 17.5, macOS Sonoma 14.5, or macOS Ventura 13.6.7 to apply the security fixes. 2. Educate users about the risks of installing untrusted or unknown shortcuts and encourage downloading shortcuts only from reputable sources. 3. Implement mobile device management (MDM) policies to restrict or monitor shortcut usage, especially in enterprise environments. 4. Audit existing shortcuts for suspicious or overly permissive actions that could exploit this vulnerability. 5. Monitor device and network logs for unusual shortcut activity or data access patterns. 6. Enforce strong endpoint security controls and limit sensitive data access on mobile devices where possible. 7. Stay informed on Apple security advisories and threat intelligence updates related to this vulnerability. These steps go beyond generic patching by emphasizing user awareness, administrative controls, and proactive monitoring to reduce exploitation risk.