Description
A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 60.8 | 60.8 |
| Mozilla | Firefox | unspecified – < 68 | 68 |
| Mozilla | Thunderbird | unspecified – < 60.8 | 60.8 |
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 | 60.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:60.8.0-1 | — |
| Debian 13 | firefox-esr | 60.8.0esr-1 | — |
| Debian 13 | thunderbird | 1:60.8.0-1 | — |
| Debian 12 | firefox-esr | 60.8.0esr-1 | — |
| Debian 12 | thunderbird | 1:60.8.0-1 | — |
| Debian 10 | firefox-esr | 60.8.0esr-1~deb10u1 | DSA-4479-1 |
| Debian 10 | thunderbird | 1:60.8.0-1~deb10u1 | DSA-4482-1 |
| Debian 9 | firefox-esr | 60.8.0esr-1~deb9u1 | DSA-4479-1 |
| Debian 9 | thunderbird | 1:60.8.0-1~deb9u1 | DSA-4482-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | firefox-esr | 60.8.0esr-1~deb8u1 | DLA-1869-1 |
| Debian 8 | thunderbird | 1:60.8.0-1~deb8u1 | DLA-1870-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | firefox | 68.0+build3-0ubuntu0.18.04.1 | USN-4054-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | thunderbird | 1:60.8.0+build1-0ubuntu0.18.04.1 | USN-4064-1 |
| Ubuntu 16.04 LTS | firefox | 68.0+build3-0ubuntu0.16.04.1 | USN-4054-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:60.8.0+build1-0ubuntu0.16.04.2 | USN-4064-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | firefox +1 | 60.8.0-1.el8_0 | RHSA-2019:1799, RHSA-2019:1764 |
| RHEL 7 | firefox +1 | 60.8.0-1.el7_6 | RHSA-2019:1775, RHSA-2019:1763 |
| RHEL 6 | firefox +1 | 60.8.0-1.el6_10 | RHSA-2019:1777, RHSA-2019:1765 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | MozillaFirefox | 60.8.0-3.51.4 | SUSE-SU-2019:1869-1 |
| SLES 15 SP1 | MozillaThunderbird | 60.8.0-3.46.2 | SUSE-SU-2019:2515-1, SUSE-SU-2019:1960-1 |
| SLES 15 SP1 | mozilla-nss | 3.44.1-3.16.2 | SUSE-SU-2019:1869-1 |
| SLES 15 | MozillaFirefox | 60.8.0-3.51.4 | SUSE-SU-2019:1869-1 |
| SLES 15 | MozillaThunderbird | 60.8.0-3.46.2 | SUSE-SU-2019:2515-1, SUSE-SU-2019:1960-1 |
| SLES 15 | mozilla-nss | 3.44.1-3.16.2 | SUSE-SU-2019:1869-1 |
| SLES 12 SP5 | MozillaFirefox | 68.1.0-109.89.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP4 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES 12 SP4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP4 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES 12 SP3 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES 12 SP3 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP3 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES 12 SP2 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP2 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES 12 SP1 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES 12 SP1 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES 12 SP1 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES 11 SP4 | MozillaFirefox | 60.8.0esr-78.43.2 | SUSE-SU-2019:14246-1, SUSE-SU-2019:14124-1 |
| 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 | 2.54.3-2.14.7 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gtk3 | 3.10.9-2.15.3 | SUSE-SU-2019:14246-1 |
| 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 | 68.1.0-109.89.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP4 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP3 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP3 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP2 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP2 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SLES for SAP 12 SP1 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SUSE Package Hub 12 | MozillaThunderbird | 60.8.0-88.1 | openSUSE-SU-2019:1990-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-2 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud Crowbar 8 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-2 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud 8 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE OpenStack Cloud 7 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-2 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE HPE Helion OpenStack 8 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-2 |
| SUSE Enterprise Storage 5 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-3, SUSE-SU-2019:1861-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE Enterprise Storage 5 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-3, SUSE-SU-2019:1861-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 60.8.0-109.83.3 | SUSE-SU-2019:2620-1, SUSE-SU-2019:1861-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox-branding-SLE | 68-32.8.1 | SUSE-SU-2019:2620-1 |
| SUSE Enterprise Storage 4 | mozilla-nss | 3.44.1-58.28.1 | SUSE-SU-2019:1861-1 |
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 +1 | 60.8.0-lp151.2.10.1 | openSUSE-SU-2019:2249-1, openSUSE-SU-2019:1813-1, openSUSE-SU-2019:1782-1 |
| openSUSE Leap 15.1 | enigmail | 2.1.2-lp151.2.6.1 | openSUSE-SU-2019:2249-1 |
| openSUSE Leap 15.1 | mozilla-nss | 3.44.1-lp151.2.3.1 | openSUSE-SU-2019:1782-1 |
| openSUSE Leap 15.0 | MozillaThunderbird | 60.8.0-lp151.2.10.1 | openSUSE-SU-2019:2248-1, openSUSE-SU-2019:1813-1 |
| openSUSE Leap 15.0 | enigmail | 2.1.2-lp150.34.1 | openSUSE-SU-2019:2248-1 |
| openSUSE Leap 15.0 | mozilla-nss | 3.44.1-lp150.2.24.1 | openSUSE-SU-2019:1811-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 68.0-r0 | — |
| Alpine v3.22 | firefox-esr | 68.0-r0 | — |
| Alpine v3.21 | firefox-esr | 68.0-r0 | — |
| Alpine v3.20 | firefox-esr | 68.0-r0 | — |
| Alpine v3.19 | firefox-esr | 68.0-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 68.0-r0 | — |
| Alpine v3.17 | firefox-esr | 68.0-r0 | — |
| Alpine v3.16 | firefox-esr | 68.0-r0 | — |
| Alpine v3.15 | firefox-esr | 68.0-r0 | — |
| Alpine v3.14 | firefox-esr | 68.0-r0 | — |
| Alpine v3.13 | firefox-esr | 68.0-r0 | — |
| Alpine v3.12 | firefox-esr | 68.0-r0 | — |
| Alpine v3.11 | firefox-esr | 68.0-r0 | — |
| Alpine v3.10 | firefox-esr | 60.8.0-r0 | — |
| Alpine v3.9 | firefox-esr | 60.8.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 60.8.0-1.amzn2.0.1 | ALAS2-2019-1267 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | firefox | 60.8.0-1.0.2.el8_0 | ELSA-2019-1764 |
| Oracle Linux 8 | thunderbird | 60.8.0-1.0.1.el8_0 | ELSA-2019-1799 |
| Oracle Linux 7 | firefox +1 | 60.8.0-1.0.1.el7_6 | ELSA-2019-1775, ELSA-2019-1763 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
lihuaiqiu/CVE-2019-11730 ★ 0 · Mar 18, 2020
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 36
- RHSA-2019:1775 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2019:1777 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2019:1763 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2019:1765 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4064-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4054-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4479-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4482-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1870-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1869-1 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
- openSUSE-SU-2019:1990-1 Security update for MozillaThunderbird 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-2019:1811-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14124-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1869-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1782-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1861-2 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1960-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1861-1 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
- openSUSE-SU-2019:1813-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1861-3 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-2019:1799 Red Hat Security Advisory: thunderbird security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- RHSA-2019:1764 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- WID-SEC-2023-0459 Mozilla Firefox/Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 2, 2025
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2019-1267 Critical: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 9, 2019
- ELSA-2019-1764 Critical: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 30, 2019
- ELSA-2019-1799 Important: thunderbird security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 30, 2019
- ELSA-2019-1775 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 15, 2019
- ELSA-2019-1763 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 11, 2019
References
- https://www.mozilla.org/security/advisories/mfsa2019-21/
- https://www.mozilla.org/security/advisories/mfsa2019-22/
- https://www.mozilla.org/security/advisories/mfsa2019-23/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1558299
- openSUSE-SU-2019:1811 vendor-advisory
- openSUSE-SU-2019:1813 vendor-advisory
- [debian-lts-announce] 20190802 [SECURITY] [DLA 1869-1] firefox-esr security update mailing-list
- [debian-lts-announce] 20190802 [SECURITY] [DLA 1870-1] thunderbird security update mailing-list
- GLSA-201908-12 vendor-advisory
- GLSA-201908-20 vendor-advisory
- openSUSE-SU-2019:1990 vendor-advisory
- openSUSE-SU-2019:2248 vendor-advisory
- openSUSE-SU-2019:2249 vendor-advisory