CVE-2019-8771

Name: CVE-2019-8771
Creator: NVD / NIST
Published: 2020-10-27T20:15:19.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2019-8771 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 13.0.1, iOS 13. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 13.0.1, iOS 13. Maliciously crafted web content may violate iframe sandboxing policy.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.99%

58.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1021

Affected Software

Vendor	Product	Versions
Apple	Safari	< 13.0.1
Apple	Iphone Os	< 13.0.

References

https://support.apple.com/en-us/HT210605Vendor Advisory
https://support.apple.com/en-us/HT210606Vendor Advisory
https://support.apple.com/en-us/HT210605Vendor Advisory
https://support.apple.com/en-us/HT210606Vendor Advisory

Timeline

Published: Oct 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-8771?

This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 13.0.1, iOS 13. Maliciously crafted web content may violate iframe sandboxing policy.

How severe is CVE-2019-8771?

CVE-2019-8771 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8771?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-8771?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST