What is CVE-2021-30803?

CVE-2021-30803 is a low-severity vulnerability in Apple macOS. CVSS score: 3.3/10. Published 2021-09-08.

How severe is CVE-2021-30803?

Low severity. CVSS v3 base score is 3.3 out of 10.

Vulnerability in Apple macOS

CVE-2021-30803

A permissions issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.5. A malicious application may be able to access a user’s recent Contacts.

Published 2021-09-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Apple macOS — versions unspecified

References

support.apple.com/en-us/HT212602 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-30803?: CVE-2021-30803 is a low-severity vulnerability in Apple macOS. CVSS score: 3.3/10. Published 2021-09-08.
How severe is CVE-2021-30803?: Low severity. CVSS v3 base score is 3.3 out of 10.