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ExploitedIn CISA KEVFix available

CVE-2019-11707

Exploitation confirmed. First attested on 2022-05-23 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2019-07-23
  • Fixed in67.0.3 · 60.7.1
  • WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

Timeline

dates in UTC
  1. 2019-06-26Exploit-DB entryExploit-DB
  2. 2019-07-2314:15CVE publishedNVD
  3. 2022-05-23Added to the CISA KEV catalogCISA KEV
  4. 2022-05-23Listed as exploited by GCVEGCVE
  5. 2022-05-23Exploitation first reportedCISA KEV
  6. 2025-02-0712:49SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Mozilla firefox
BranchAffectedFixed in
67.0< 67.0.367.0.3
60.7< 60.7.160.7.1
Mozilla thunderbird
BranchAffectedFixed in
60.7< 60.7.260.7.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA3 products

As mozilla, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Mozilla Firefox ESR
    Affected
    • < 60.7.1fixed in 60.7.1custom
  • Mozilla Firefox
    Affected
    • < 67.0.3fixed in 67.0.3custom
  • Mozilla Thunderbird
    Affected
    • < 60.7.2fixed in 60.7.2custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2019-08-15

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • firefoxUbuntu:18.04:LTSall versions · fixed in 67.0.3+build1-0ubuntu0.18.04.1
  • firefoxUbuntu:16.04:LTSall versions · fixed in 67.0.3+build1-0ubuntu0.16.04.1
  • firefoxRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:60.7.2-3.el8_0and 2 other packages
  • firefoxRed Hat:enterprise_linux:7::workstationall versions · fixed in 0:60.7.2-1.el7_6and 1 other package
  • firefoxRed Hat:enterprise_linux:7::serverall versions · fixed in 0:60.7.2-1.el7_6and 1 other package
  • firefoxRed Hat:enterprise_linux:7::clientall versions · fixed in 0:60.7.2-1.el7_6and 1 other package
  • firefoxRed Hat:enterprise_linux:6::workstationall versions · fixed in 0:60.7.2-1.el6_10and 1 other package
  • firefoxRed Hat:enterprise_linux:6::serverall versions · fixed in 0:60.7.2-1.el6_10and 1 other package

75 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-11707 Red Hat Product Security229 products fixed

    Mozilla: Type confusion in Array.pop

  • RHSA-2019:1696 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2019:1626 Red Hat Product Security16 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:1624 Red Hat Product Security19 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:1623 Red Hat Product Security7 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2019:1603 Red Hat Product Security28 products fixed

    Red Hat Security Advisory: firefox security update

1 more advisory

Full record on NVD

Fix

  1. Update Mozilla firefox to 67.0.3 · 60.7.1
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-06-13
  3. Vendor fix Red Hat Product Security RHSA-2019:1696 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the update, Firefox must be restarted for the changes to take effect.
  4. Vendor fix Red Hat Product Security RHSA-2019:1626 · 16 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All running instances of Thunderbird must be restarted for the update to take effect.

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-47038EDB-50691
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-05-23
Patch Due Date
2022-06-13
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2019-07-23
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-8ffr-q7j8-h445

Frequently asked questions

What is CVE-2019-11707?

A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.

Is CVE-2019-11707 actively exploited?

Yes. CVE-2019-11707 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-06-13.

What is the CVSS score for CVE-2019-11707?

CVE-2019-11707 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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