What is CVE-2023-27951?

CVE-2023-27951 is a medium-severity vulnerability in Apple macOS, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2023-05-08.

How severe is CVE-2023-27951?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2023-27951 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Apple macOS

CVE-2023-27951

The issue was addressed with improved checks. This issue is fixed in macOS Ventura 13.3, macOS Monterey 12.6.4, macOS Big Sur 11.7.5. An archive may be able to bypass Gatekeeper.

Vulnerability class: Broken Access Control

Published 2023-05-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Apple macOS — versions unspecified

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

houjingyi233/macOS-iOS-system-security

References

support.apple.com/en-us/HT213670 (Vendor Advisory)
support.apple.com/en-us/HT213677 (Vendor Advisory)
support.apple.com/en-us/HT213675 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-27951?: CVE-2023-27951 is a medium-severity vulnerability in Apple macOS, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2023-05-08.
How severe is CVE-2023-27951?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-27951 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.