CVE-2019-11723

Name: CVE-2019-11723
Creator: NVD / NIST
Published: 2019-07-23T14:15:16.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2019-11723 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context. This could leak cookies in private browsing mode or across different "containers" for people who use the Firefox Multi-Account Containers Web Extension. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context. This could leak cookies in private browsing mode or across different "containers" for people who use the Firefox Multi-Account Containers Web Extension. This vulnerability affects Firefox < 68.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.81%

52.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 68.0
Opensuse	Leap	15.0
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.htmlMailing List, Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1528335Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.htmlMailing List, Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1528335Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201908-12Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory

Timeline

Published: Jul 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11723?

How severe is CVE-2019-11723?

CVE-2019-11723 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11723?

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-2019-11723?

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

Scan your code now

Source: NVD / NIST