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Fencer Intel
medium 6.5

CVE-2019-11730 json

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 dire…

published 7y ago modified 4mo ago also EUVD-2019-3400

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
20.3%
EPSS 20.3% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

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.

Patch / fix

  • Mozilla Firefox ESR 60.8
  • Mozilla Firefox 68
  • Mozilla Thunderbird 60.8
  • firefox-esr Debian 14, Debian 13, Debian 12 60.8.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:60.8.0-1

debian advisories DEBIAN-CVE-2019-11730

  • firefox Ubuntu 16.04 LTS 68.0+build3-0ubuntu0.16.04.1
  • firefox Ubuntu 18.04 LTS 68.0+build3-0ubuntu0.18.04.1
  • thunderbird Ubuntu 16.04 LTS 1:60.8.0+build1-0ubuntu0.16.04.2
  • thunderbird Ubuntu 18.04 LTS 1:60.8.0+build1-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-11730

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 6 60.8.0-1.el6_10
  • thunderbird RHEL 7 60.8.0-1.el7_6
  • thunderbird RHEL 8 60.8.0-1.el8_0
  • firefox RHEL 8 60.8.0-1.el8_0
  • firefox RHEL 7 60.8.0-1.el7_6
  • firefox RHEL 6 60.8.0-1.el6_10

red hat advisories RHSA-2019:1777RHSA-2019:1775RHSA-2019:1799RHSA-2019:1764RHSA-2019:1763RHSA-2019:1765

  • 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
  • MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 68.1.1-3.51.1
  • MozillaFirefox SLES 12 SP4, SLES 12 SP3-BCL, SLES 12 SP2-BCL +15 more 60.8.0-109.83.3
  • mozilla-nss SLES 12 SP4, SLES 12 SP3-BCL, SLES 12 SP2-BCL +15 more 3.44.1-58.28.1
  • MozillaThunderbird SLE Workstation Extension 15 SP1, SLE Workstation Extension 15 60.8.0-3.46.2
  • MozillaFirefox SLE Module for Desktop Applications 15 SP1, SLE Module for Desktop Applications 15 60.8.0-3.51.4
  • mozilla-nss SLE Module for Server Applications 15 SP1, SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 3.44.1-3.16.2

suse advisories SUSE-SU-2019:14246-1SUSE-SU-2019:2620-1SUSE-SU-2019:2515-1SUSE-SU-2019:1861-2SUSE-SU-2019:1960-1SUSE-SU-2019:1869-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2
  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • 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
  • enigmail openSUSE Leap 15.0 2.1.2-lp150.34.1
  • MozillaThunderbird Package Hub 12 60.8.0-88.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2019:2249-1openSUSE-SU-2019:2248-1openSUSE-SU-2019:1990-1

  • firefox-esr Alpine 3.10, Alpine 3.9 60.8.0-r0
  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +10 more 68.0-r0

alpine advisories ALPINE-CVE-2019-11730

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 68.0-1

arch linux advisories AVG-1002

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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-2019-11730 updated cvss 6.1

Mozilla: Same-origin policy treats all files in a directory as having the same-origin

  • Red Hat Enterprise Linux 5 firefox
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 60.8.0-1.el8_0, thunderbird 60.8.0-1.el8_0
    fixed: vendor fix RHSA-2019:1764
  • Red Hat Enterprise Linux Client (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6 Red Hat Enterprise Linux Client Optional (v. 7) firefox 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763
  • Red Hat Enterprise Linux Desktop (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 60.8.0-1.el6_10
    fixed: vendor fix RHSA-2019:1765
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1775
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 60.8.0-1.el6_10 Red Hat Enterprise Linux Server (v. 6) firefox 60.8.0-1.el6_10
    fixed: vendor fix RHSA-2019:1765
  • Red Hat Enterprise Linux Server (v. 7) firefox 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763
show 6 more
  • Red Hat Enterprise Linux Server Optional (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10
    fixed: vendor fix RHSA-2019:1765
  • Red Hat Enterprise Linux Server Optional (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763
  • Red Hat Enterprise Linux Workstation (v. 6) firefox 60.8.0-1.el6_10, thunderbird 60.8.0-1.el6_10
    fixed: vendor fix RHSA-2019:1765
  • Red Hat Enterprise Linux Workstation (v. 7) firefox 60.8.0-1.el7_6, thunderbird 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763
  • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 60.8.0-1.el6_10
    fixed: vendor fix RHSA-2019:1765
  • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 60.8.0-1.el7_6
    fixed: vendor fix RHSA-2019:1763

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

20.27% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • Mozilla Firefox ESR
  • Mozilla Firefox
  • Mozilla Thunderbird

References

Sources

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.