CASCACascade Atlas

Evidence dossier

CVE-2019-11707

CVE-2019-11707

71.1–89.3Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Jul 23, 2019
Updated
Oct 21, 2025
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS37.95%

2026-07-18 · v2026.06.15 · percentile 98.4%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
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CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

mozillaoriginal assertion
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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.

CISA KEVoriginal assertion
observed_exploitation

Mozilla Firefox and Thunderbird Type Confusion Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.379510000000; percentile 0.983850000000

Applicability

Cited product scope

Trace impact →
MozillaFirefox
[{"status": "affected", "version": "unspecified", "lessThan": "67.0.3", "versionType": "custom"}]unknown
MozillaFirefox ESR
[{"status": "affected", "version": "unspecified", "lessThan": "60.7.1", "versionType": "custom"}]unknown
MozillaThunderbird
[{"status": "affected", "version": "unspecified", "lessThan": "60.7.2", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*; end excluding 67.0.3supported
Unknown vendorUnknown product
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*; end excluding 60.7.1supported
Unknown vendorUnknown product
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*; end excluding 60.7.2supported

Assessments

CVSS by origin

8.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:P/I:P/A:P
8.8
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.