CVE-2019-11744

Name: CVE-2019-11744
Creator: NVD / NIST
Published: 2019-09-27T18:15:12.13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2019-11744 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Some HTML elements, such as <title> and <textarea>, can contain literal angle brackets without treating them as markup. It is possible to pass a literal closing tag to .innerHTML on these elements, and subsequent content after that will be parsed as if it were outside the tag. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

Some HTML elements, such as <title> and <textarea>, can contain literal angle brackets without treating them as markup. It is possible to pass a literal closing tag to .innerHTML on these elements, and subsequent content after that will be parsed as if it were outside the tag. This can lead to XSS if a site does not filter user input as strictly for these elements as it does for other elements. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

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

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 60.9
Mozilla	Firefox	< 69.0
Mozilla	Firefox	>= 68.0, < 68.1
Mozilla	Thunderbird	< 60.9
Mozilla	Thunderbird	>= 68.0, < 68.1

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1562033Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201911-07
https://usn.ubuntu.com/4150-1/
https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-27/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-30/Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1562033Issue Tracking, Permissions Required, Vendor Advisory
https://security.gentoo.org/glsa/201911-07
https://usn.ubuntu.com/4150-1/
https://www.mozilla.org/security/advisories/mfsa2019-25/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-26/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-27/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-30/Vendor Advisory

Timeline

Published: Sep 27, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11744?

How severe is CVE-2019-11744?

CVE-2019-11744 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11744?

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-2019-11744?

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

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Source: NVD / NIST