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CVE-2019-11730: 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 direc

Noroxi assessment

Priority: Monitor (action score 32/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 20.2% (FIRST EPSS); higher than 97.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: firefox-esr (Debian:10) 60.8.0esr-1~deb10u1; thunderbird (Debian:10) 1:60.8.0-1~deb10u1; firefox-esr (Debian:12) 60.8.0esr-1.

Low priority for now. Upgrade to firefox-esr (Debian:10) 60.8.0esr-1~deb10u1; thunderbird (Debian:10) 1:60.8.0-1~deb10u1; firefox-esr (Debian:12) 60.8.0esr-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.5 · v3.1—Proof of concept Fix available
Published
Jul 23, 2019
Updated
Jun 16, 2026
EPSS
20.2% · 97th percentile
CWE
—

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 20.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-11730

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
mozillafirefox esr
mozillathunderbird
debiandebian linux
opensuseleap
susepackage hub
suselinux enterprise

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux8.0
  • mozilla firefoxbefore 68.0
  • mozilla firefox esrbefore 60.8
  • mozilla thunderbirdbefore 60.8
  • opensuse leap15.0
  • opensuse leap15.1
  • suse package huball versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

  • Mozilla Firefox

    • unspecified and later · before 68affected

  • Mozilla Firefox ESR

    • unspecified and later · before 60.8affected

  • Mozilla Thunderbird

    • unspecified and later · before 60.8affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10firefox-esrbefore 60.8.0esr-1~deb10u160.8.0esr-1~deb10u1
Debian:10thunderbirdbefore 1:60.8.0-1~deb10u11:60.8.0-1~deb10u1
Debian:12firefox-esrbefore 60.8.0esr-160.8.0esr-1
Debian:12thunderbirdbefore 1:60.8.0-11:60.8.0-1
Debian:8firefox-esrbefore 60.8.0esr-1~deb8u160.8.0esr-1~deb8u1
Debian:8thunderbirdbefore 1:60.8.0-1~deb8u11:60.8.0-1~deb8u1
Debian:9firefox-esrbefore 60.8.0esr-1~deb9u160.8.0esr-1~deb9u1
Debian:9thunderbirdbefore 1:60.8.0-1~deb9u11:60.8.0-1~deb9u1
openSUSE:Leap 15.0enigmailbefore 2.1.2-lp150.34.12.1.2-lp150.34.1
openSUSE:Leap 15.0mozilla-nssbefore 3.44.1-lp150.2.24.13.44.1-lp150.2.24.1
openSUSE:Leap 15.0MozillaThunderbirdbefore 68.1.1-lp150.3.51.168.1.1-lp150.3.51.1
openSUSE:Leap 15.0MozillaThunderbirdbefore 60.8.0-lp151.2.10.160.8.0-lp151.2.10.1
openSUSE:Leap 15.1enigmailbefore 2.1.2-lp151.2.6.12.1.2-lp151.2.6.1
openSUSE:Leap 15.1mozilla-nssbefore 3.44.1-lp151.2.3.13.44.1-lp151.2.3.1
openSUSE:Leap 15.1MozillaFirefoxbefore 60.8.0-lp151.2.10.160.8.0-lp151.2.10.1
openSUSE:Leap 15.1MozillaThunderbirdbefore 68.1.1-lp151.2.13.168.1.1-lp151.2.13.1
Red Hat:enterprise_linux:6::clientfirefoxbefore 0:60.8.0-1.el6_100:60.8.0-1.el6_10
Red Hat:enterprise_linux:6::clientfirefox-debuginfobefore 0:60.8.0-1.el6_100:60.8.0-1.el6_10
Red Hat:enterprise_linux:6::clientthunderbirdbefore 0:60.8.0-1.el6_100:60.8.0-1.el6_10
Red Hat:enterprise_linux:6::clientthunderbird-debuginfobefore 0:60.8.0-1.el6_100:60.8.0-1.el6_10
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:60.8.0-1.el7_60:60.8.0-1.el7_6
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:60.8.0-1.el7_60:60.8.0-1.el7_6
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:60.8.0-1.el7_60:60.8.0-1.el7_6
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:60.8.0-1.el7_60:60.8.0-1.el7_6

+16

Same product

mozilla: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2019-11728Jul 23, 2019 · The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a us
    18Monitor
  • ← EarlierCVE-2019-11729Jul 23, 2019 · Empty or malformed p256-ECDH public keys may trigger a segmentation fault due values being improperly sanitized before being copied into mem
    31Monitor
  • Later →CVE-2019-9800Jul 23, 2019 · Mozilla developers and community members reported memory safety bugs present in Firefox 66, Firefox ESR 60.6, and Thunderbird 60.6.
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:firefox-esr60.8.0esr-1 · Debian:12Package registry (OSV)
debian:thunderbird1:60.8.0-1 · Debian:12Package registry (OSV)
opensuse:enigmail2.1.2-lp150.34.1 · openSUSE:Leap 15.0Package registry (OSV)
opensuse:mozilla-nss3.44.1-lp151.2.3.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:MozillaFirefox60.8.0-lp151.2.10.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:MozillaThunderbird60.8.0-lp151.2.10.1 · openSUSE:Leap 15.0Package registry (OSV)
red hat:firefox0:60.8.0-1.el7_6 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:firefox-debuginfo0:60.8.0-1.el7_6 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:firefox-debugsource0:60.8.0-1.el8_0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:thunderbird0:60.8.0-1.el7_6 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:thunderbird-debuginfo0:60.8.0-1.el7_6 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:thunderbird-debugsource0:60.8.0-1.el8_0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
suse:mozilla-nss3.44.1-58.28.1 · SUSE:OpenStack Cloud 7Package registry (OSV)
suse:MozillaFirefox60.8.0esr-78.43.2 · SUSE:Linux Enterprise Server 11 SP4-LTSSPackage registry (OSV)
suse:MozillaFirefox-branding-SLE68-32.8.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:MozillaThunderbird60.8.0-3.46.2 · SUSE:Linux Enterprise Workstation Extension 15Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02020-03-18

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+239 d
  3. TodayNov 2, 2026+2659 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (12 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records