CVE-2020-13753

Name: CVE-2020-13753
Creator: NVD / NIST
Published: 2020-07-14T14:15:17.603+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 2.92%

Last modified Jun 17, 2026

CVE-2020-13753 is a critical-severity vulnerability rated 10/10 on the CVSS scale. The bubblewrap sandbox of WebKitGTK and WPE WebKit, prior to 2.28.3, failed to properly block access to CLONE_NEWUSER and the TIOCSTI ioctl. CLONE_NEWUSER could potentially be used to confuse xdg-desktop-portal, which allows access outside the sandbox. EPSS estimates a 2.92% chance of exploitation in the next 30 days.

Description

The bubblewrap sandbox of WebKitGTK and WPE WebKit, prior to 2.28.3, failed to properly block access to CLONE_NEWUSER and the TIOCSTI ioctl. CLONE_NEWUSER could potentially be used to confuse xdg-desktop-portal, which allows access outside the sandbox. TIOCSTI can be used to directly execute commands outside the sandbox by writing to the controlling terminal's input buffer, similar to CVE-2017-5226.

Metrics

CVSS 3.1

10/10

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

EPSS Probability

2.92%

85.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Webkitgtk	Webkitgtk	< 2.28.3
Wpewebkit	Wpe Webkit	< 2.28.3
Fedoraproject	Fedora	31
Debian	Debian Linux	10.0
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Canonical	Ubuntu Linux	20.04
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
https://security.gentoo.org/glsa/202007-11Third Party Advisory
https://trac.webkit.org/changeset/262368/webkitPatch, Vendor Advisory
https://usn.ubuntu.com/4422-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4724Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/10/1Mailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00074.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GER2ATKZXDHM7FFYJH67ZPNZZX5VOUVM/
https://security.gentoo.org/glsa/202007-11Third Party Advisory
https://trac.webkit.org/changeset/262368/webkitPatch, Vendor Advisory
https://usn.ubuntu.com/4422-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4724Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/07/10/1Mailing List, Third Party Advisory

Timeline

Published: Jul 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13753?

How severe is CVE-2020-13753?

CVE-2020-13753 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 2.92% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13753?

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-2020-13753?

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

Scan your code now

Source: NVD / NIST