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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 69 | 69 |
| Mozilla | Thunderbird | unspecified – < 68.1, unspecified – < 60.9 | 68.1 |
| Mozilla | Firefox ESR | unspecified – < 60.9, unspecified – < 68.1 | 60.9 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 68.1.0esr-1 | — |
| Debian 14 | thunderbird | 1:60.9.0-1 | — |
| Debian 13 | firefox-esr | 68.1.0esr-1 | — |
| Debian 13 | thunderbird | 1:60.9.0-1 | — |
| Debian 12 | firefox-esr | 68.1.0esr-1 | — |
| Debian 12 | thunderbird | 1:60.9.0-1 | — |
| Debian 10 | firefox-esr | 60.9.0esr-1~deb10u1 | DSA-4516-1 |
| Debian 10 | thunderbird | 1:60.9.0-1~deb10u1 | DSA-4523-1 |
| Debian 9 | firefox-esr | 60.9.0esr-1~deb9u1 | DSA-4516-1 |
| Debian 9 | thunderbird | 1:60.9.0-1~deb9u1 | DSA-4523-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | firefox-esr | 60.9.0esr-1~deb8u1 | DLA-1910-1 |
| Debian 8 | thunderbird | 1:60.9.0-1~deb8u1 | DLA-1926-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | firefox | 69.0+build2-0ubuntu0.18.04.1 | USN-4122-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | thunderbird | 1:60.9.0+build1-0ubuntu0.18.04.1 | USN-4150-1 |
| Ubuntu 16.04 LTS | firefox | 69.0+build2-0ubuntu0.16.04.4 | USN-4122-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:60.9.0+build1-0ubuntu0.16.04.2 | USN-4150-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | firefox | 68.1.0-1.el8_0 | RHSA-2019:2663 |
| RHEL 8 | thunderbird | 60.9.0-2.el8_0 | RHSA-2019:2774 |
| RHEL 7 | firefox +1 | 60.9.0-1.el7_7 | RHSA-2019:2773, RHSA-2019:2729 |
| RHEL 6 | firefox +1 | 60.9.0-1.el6_10 | RHSA-2019:2807, RHSA-2019:2694 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | MozillaFirefox | 68.1.0-3.54.2 | SUSE-SU-2019:2545-1 |
| SLES 15 SP1 | MozillaFirefox-branding-SLE | 68-4.8.5 | SUSE-SU-2019:2545-1 |
| SLES 15 SP1 | MozillaThunderbird | 68.1.1-3.51.1 | SUSE-SU-2019:2515-1 |
| SLES 15 | MozillaFirefox | 68.1.0-3.54.2 | SUSE-SU-2019:2545-1 |
| SLES 15 | MozillaFirefox-branding-SLE | 68-4.8.5 | SUSE-SU-2019:2545-1 |
| SLES 15 | MozillaThunderbird | 68.1.1-3.51.1 | SUSE-SU-2019:2515-1 |
| SLES 12 SP5 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP4 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES 12 SP4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP3 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES 12 SP3 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES 12 SP2 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP1 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES 12 SP1 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 11 SP4 | MozillaFirefox | 60.9.0esr-78.46.2 | SUSE-SU-2019:14246-1, SUSE-SU-2019:14173-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 68-21.9.8 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-atk | 2.26.1-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-cairo | 1.15.10-2.13.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gdk-pixbuf | 2.36.11-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-glib2 | 2.54.3-2.11.1 | SUSE-SU-2019:14246-1, SUSE-SU-2019:14173-1 |
| SLES 11 SP4 | firefox-gtk3 | 3.10.9-2.12.2 | SUSE-SU-2019:14246-1, SUSE-SU-2019:14173-1 |
| SLES 11 SP4 | firefox-harfbuzz | 1.7.5-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi | 3.2.1.git259-2.3.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi-gcc5 | 5.3.1+r233831-14.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-pango | 1.40.14-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nspr | 4.21-29.6.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nss | 3.45-38.9.3 | SUSE-SU-2019:14246-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES for SAP 12 SP5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES for SAP 12 SP4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES for SAP 12 SP3 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES for SAP 12 SP2 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SLES for SAP 12 SP1 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 60.9.0-109.86.1 | SUSE-SU-2019:2620-1, SUSE-SU-2019:2436-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.1 | MozillaFirefox | 68.1.0-lp151.2.14.1 | openSUSE-SU-2019:2251-1 |
| openSUSE Leap 15.1 | MozillaThunderbird | 68.1.1-lp151.2.13.1 | openSUSE-SU-2019:2249-1 |
| openSUSE Leap 15.1 | enigmail | 2.1.2-lp151.2.6.1 | openSUSE-SU-2019:2249-1 |
| openSUSE Leap 15.0 | MozillaFirefox | 68.1.0-lp150.3.66.1 | openSUSE-SU-2019:2260-1 |
| openSUSE Leap 15.0 | MozillaThunderbird | 68.1.1-lp150.3.51.1 | openSUSE-SU-2019:2248-1 |
| openSUSE Leap 15.0 | enigmail | 2.1.2-lp150.34.1 | openSUSE-SU-2019:2248-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.22 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.21 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.20 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.19 | firefox-esr | 68.1.0-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.17 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.16 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.15 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.14 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.13 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.12 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.11 | firefox-esr | 68.1.0-r0 | — |
| Alpine v3.10 | firefox-esr | 69.9.0-r0 | — |
| Alpine v3.9 | firefox-esr | 69.9.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 60.9.0-1.amzn2.0.1 | ALAS2-2019-1304 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | firefox | 68.1.0-1.0.1.el8_0 | ELSA-2019-2663 |
| Oracle Linux 8 | thunderbird | 60.9.0-2.0.1.el8_0 | ELSA-2019-2774 |
| Oracle Linux 7 | firefox +1 | 60.9.0-1.0.1.el7_7 | ELSA-2019-2773, ELSA-2019-2729 |
Advisories 30
- RHSA-2019:2729 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2019:2694 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2019:2663 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2019:2807 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2019:2773 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4150-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4122-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4516-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4523-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1926-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1910-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2019:2249-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2436-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2248-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2260-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2251-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14173-1 Security update for MozillaFirefox, firefox-glib2, firefox-gtk3 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2545-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2620-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14246-1 Security update for Mozilla Firefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2515-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2019:2774 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2019-1304 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2019
- ELSA-2019-2774 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 17, 2019
- ELSA-2019-2773 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 16, 2019
- ELSA-2019-2729 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2019
- ELSA-2019-2663 Critical: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 6, 2019
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1562033
- https://www.mozilla.org/security/advisories/mfsa2019-25/
- https://www.mozilla.org/security/advisories/mfsa2019-27/
- https://www.mozilla.org/security/advisories/mfsa2019-26/
- https://www.mozilla.org/security/advisories/mfsa2019-29/
- https://www.mozilla.org/security/advisories/mfsa2019-30/
- openSUSE-SU-2019:2248 vendor-advisory
- openSUSE-SU-2019:2249 vendor-advisory
- openSUSE-SU-2019:2251 vendor-advisory
- openSUSE-SU-2019:2260 vendor-advisory
- USN-4150-1 vendor-advisory
- GLSA-201911-07 vendor-advisory