CVE-2025-31261 is a permissions vulnerability in Apple macOS identified as CWE-276 (Incorrect Default Permissions). The flaw stems from insufficient sandbox restrictions that allow an application to bypass intended access controls and read protected user data. This vulnerability affects macOS versions prior to Sequoia 15.4, Sonoma 14.7.5, and Ventura 13.7.5, where Apple introduced additional sandbox constraints to address the issue. The attack vector requires local access (AV:L), no privileges (PR:N), and user interaction (UI:R), indicating that a user must run or interact with a malicious or compromised app for exploitation. The vulnerability impacts confidentiality (C:H) but does not affect integrity or availability. The CVSS 3.1 base score is 5.5, reflecting a medium severity level. No public exploits have been reported, but the potential for sensitive data exposure exists if exploited. The vulnerability highlights the importance of strict sandboxing and permission enforcement in macOS to protect user data from unauthorized app access.

If exploited, this vulnerability could allow malicious or compromised applications to access sensitive user data that should be protected by macOS sandboxing mechanisms. This breach of confidentiality could lead to unauthorized disclosure of personal information, credentials, or other sensitive files. Although the vulnerability does not impact system integrity or availability, the exposure of protected data can have serious privacy and security implications for individuals and organizations. Attackers could leverage this access for further social engineering, identity theft, or targeted attacks. Since exploitation requires user interaction and local access, the risk is somewhat mitigated but remains significant for environments with untrusted applications or users. Organizations relying on macOS for critical operations, especially those handling sensitive or regulated data, face increased risk of data leakage and compliance violations if unpatched.

1. Apply the official Apple patches immediately by upgrading to macOS Sequoia 15.4, Sonoma 14.7.5, or Ventura 13.7.5 or later versions where the vulnerability is fixed. 2. Restrict installation of applications to trusted sources and enforce strict app vetting policies to reduce the risk of malicious apps exploiting this flaw. 3. Implement application sandboxing policies and monitor app permissions regularly to detect and block unauthorized access attempts. 4. Educate users about the risks of running untrusted applications and the importance of avoiding suspicious prompts requiring interaction. 5. Use endpoint security solutions capable of detecting anomalous app behavior related to unauthorized data access. 6. Conduct regular audits of user data access logs to identify potential exploitation attempts. 7. For organizations with sensitive data, consider additional data encryption and access controls at the file system or application layer to limit exposure even if sandboxing fails.