CVE-2025-43313: 
macOS vulnerability analysis and mitigation

CVE-2025-43313 is a logic issue in the macOS CoreServices component that allows a malicious application to access sensitive user data. The vulnerability was discovered by researcher 风沐云烟 (@binary_fmyy) and disclosed by Apple on July 29, 2025, with NVD publication on October 15, 2025. It affects macOS Ventura 13.0–13.7.6, macOS Sonoma 14.0–14.7.6, and macOS Sequoia 15.0–15.5. The CVSS v3.1 base score is 5.5 (Medium) (Apple Sequoia Advisory, Apple Sonoma Advisory, Apple Ventura Advisory).

The vulnerability is classified as CWE-284 (Improper Access Control) and stems from a logic issue in the macOS CoreServices subsystem that was addressed with improved restrictions. The flaw allows a locally-installed application to bypass access control mechanisms and read sensitive user data without appropriate authorization. Exploitation requires user interaction (e.g., running a malicious app) but does not require elevated privileges, making it accessible to standard user-level applications. No detailed technical write-up or proof-of-concept code has been publicly released (Apple Sonoma Advisory, Apple Ventura Advisory).

Successful exploitation results in unauthorized access to sensitive user data stored on the affected macOS system, with a high confidentiality impact. There is no integrity or availability impact — the vulnerability is limited to data exposure. The attack is local in scope, meaning an attacker must be able to run a malicious application on the target system, limiting the potential for direct remote exploitation or lateral movement (Apple Sequoia Advisory, Apple Sonoma Advisory).

There is no public proof-of-concept exploit and no evidence of in-the-wild exploitation at this time. The EPSS score is approximately 0.012% (0.000120), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported (Apple Sonoma Advisory).

Apple has released patches addressing this vulnerability in macOS Sequoia 15.6, macOS Sonoma 14.7.7, and macOS Ventura 13.7.7, all released on July 29, 2025. Users should update their macOS installations to these versions or later immediately via System Settings > General > Software Update. As a precautionary measure, users should avoid installing applications from untrusted or unknown sources, and review application permissions regularly (Apple Sequoia Advisory, Apple Sonoma Advisory, Apple Ventura Advisory).