medium 6.1

CVE-2019-11744 json

Some HTML elements, such as <title> and <textarea>, can contain literal angle brackets without treating them as markup.

published 2019-09-27 7y ago modified 2026-06-17 4mo ago also EUVD-2019-3414

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits: 0; none known

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.

Patch / fix

fixed in 3 distros 7

Mozilla Firefox 69
Mozilla Thunderbird 60.9, 68.1
Mozilla Firefox ESR 60.9, 68.1

debian ubuntu red hat suse opensuse alpine arch linux

firefox-esr Debian 14, Debian 13, Debian 12 68.1.0esr-1
thunderbird Debian 14, Debian 13, Debian 12 1:60.9.0-1

debian advisories DEBIAN-CVE-2019-11744

firefox Ubuntu 16.04 LTS 69.0+build2-0ubuntu0.16.04.4
firefox Ubuntu 18.04 LTS 69.0+build2-0ubuntu0.18.04.1
thunderbird Ubuntu 16.04 LTS 1:60.9.0+build1-0ubuntu0.16.04.2
thunderbird Ubuntu 18.04 LTS 1:60.9.0+build1-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-11744

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

thunderbird RHEL 8 60.9.0-2.el8_0
thunderbird RHEL 7 60.9.0-1.el7_7
thunderbird RHEL 6 60.9.0-1.el6_10
firefox RHEL 7 60.9.0-1.el7_7
firefox RHEL 6 60.9.0-1.el6_10
firefox RHEL 8 68.1.0-1.el8_0

red hat advisories RHSA-2019:2774 RHSA-2019:2773 RHSA-2019:2807 RHSA-2019:2729 RHSA-2019:2694 RHSA-2019:2663

MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +18 more 68.1.0-109.89.1
MozillaFirefox-branding-SLE SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +16 more 68-32.8.1
MozillaFirefox SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 68.1.0-3.54.2
MozillaFirefox-branding-SLE SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 68-4.8.5
MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.1.1-3.51.1
MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +18 more 60.9.0-109.86.1
firefox-atk SLES 11 SP4-LTSS 2.26.1-2.8.4
mozilla-nss SLES 11 SP4-LTSS 3.45-38.9.3

suse advisories SUSE-SU-2019:14246-1 SUSE-SU-2019:2620-1 SUSE-SU-2019:2545-1 SUSE-SU-2019:2515-1 SUSE-SU-2019:2436-1 SUSE-SU-2019:14173-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 92.0-1.2
MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
MozillaFirefox openSUSE Leap 15.0 68.1.0-lp150.3.66.1
MozillaFirefox openSUSE Leap 15.1 68.1.0-lp151.2.14.1
MozillaThunderbird openSUSE Leap 15.1 68.1.1-lp151.2.13.1
enigmail openSUSE Leap 15.1 2.1.2-lp151.2.6.1
MozillaThunderbird openSUSE Leap 15.0 68.1.1-lp150.3.51.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:10600-1 openSUSE-SU-2024:10601-1 openSUSE-SU-2019:2260-1 openSUSE-SU-2019:2251-1 openSUSE-SU-2019:2249-1

firefox-esr Alpine 3.10, Alpine 3.9 69.9.0-r0
firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.1.0-r0

alpine advisories ALPINE-CVE-2019-11744

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

firefox Arch Linux 69.0-1

arch linux advisories AVG-1036

Is CVE-2019-11744 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-11744 updated 2026-11-04 cvss 6.1

Mozilla: XSS by breaking out of title and textarea elements using innerHTML

Red Hat Enterprise Linux 5 firefox, thunderbird
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 68.1.0-1.el8_0, thunderbird 60.9.0-2.el8_0
fixed: vendor fix RHSA-2019:2663
Red Hat Enterprise Linux Client (v. 7) firefox 60.9.0-1.el7_7, thunderbird 60.9.0-1.el7_7 Red Hat Enterprise Linux Client Optional (v. 7) firefox 60.9.0-1.el7_7
fixed: vendor fix RHSA-2019:2729
Red Hat Enterprise Linux Desktop (v. 6) firefox 60.9.0-1.el6_10, thunderbird 60.9.0-1.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 60.9.0-1.el6_10 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 60.9.0-1.el6_10 Red Hat Enterprise Linux Server (v. 6) firefox 60.9.0-1.el6_10
fixed: vendor fix RHSA-2019:2694
Red Hat Enterprise Linux Server (v. 7) firefox 60.9.0-1.el7_7
fixed: vendor fix RHSA-2019:2729
Red Hat Enterprise Linux Server Optional (v. 6) firefox 60.9.0-1.el6_10, thunderbird 60.9.0-1.el6_10
fixed: vendor fix RHSA-2019:2694
Red Hat Enterprise Linux Server Optional (v. 7) firefox 60.9.0-1.el7_7, thunderbird 60.9.0-1.el7_7
fixed: vendor fix RHSA-2019:2729
Red Hat Enterprise Linux Workstation (v. 6) firefox 60.9.0-1.el6_10, thunderbird 60.9.0-1.el6_10
fixed: vendor fix RHSA-2019:2694

show 3 more

Red Hat Enterprise Linux Workstation (v. 7) firefox 60.9.0-1.el7_7, thunderbird 60.9.0-1.el7_7
fixed: vendor fix RHSA-2019:2729
Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 60.9.0-1.el6_10
fixed: vendor fix RHSA-2019:2694
Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 60.9.0-1.el7_7
fixed: vendor fix RHSA-2019:2729

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.45% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Mozilla Firefox
Mozilla Thunderbird
Mozilla Firefox ESR

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

lists.opensuse.org /opensuse-security-announce/2019-10/msg00010.html
vendor-advisory
lists.opensuse.org /opensuse-security-announce/2019-10/msg00009.html
vendor-advisory
lists.opensuse.org /opensuse-security-announce/2019-10/msg00011.html
vendor-advisory
lists.opensuse.org /opensuse-security-announce/2019-10/msg00017.html
vendor-advisory
usn.ubuntu.com /4150-1/
vendor-advisory
security.gentoo.org /glsa/201911-07
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1562033
issue-tracking, permissions-required, vendor-advisory
mozilla.org /security/advisories/mfsa2019-25/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-27/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-26/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-29/
vendor-advisory
mozilla.org /security/advisories/mfsa2019-30/
vendor-advisory

Sources

CVE List CVE-2019-11744
NVD CVE-2019-11744

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

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