What is CVE-2020-3852?

CVE-2020-3852 is a medium-severity vulnerability in Apple Safari, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2020-10-27.

How severe is CVE-2020-3852?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2020-3852 known to be exploited?

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

Auth bypass in Apple Safari

CVE-2020-3852

A logic issue was addressed with improved validation. This issue is fixed in Safari 13.0.5. A URL scheme may be incorrectly ignored when determining multimedia permission for a website.

Vulnerability class: Broken Access Control

Published 2020-10-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple Safari — 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/HT210922 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3852?: CVE-2020-3852 is a medium-severity vulnerability in Apple Safari, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2020-10-27.
How severe is CVE-2020-3852?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2020-3852 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.