BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2019
CVE-2019-20149High confidence

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}

Unknown · Unknown

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 5 Aug 2024

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 2.34% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcenode-kind-ofVendor fix publishedDebian records a fixed source-package version for this release.6.0.3+dfsg-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcenode-kind-ofVendor fix publishedDebian records a fixed source-package version for this release.6.0.3+dfsg-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcenode-kind-ofVendor fix publishedDebian records a fixed source-package version for this release.6.0.3+dfsg-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcenode-kind-ofVendor fix publishedDebian records a fixed source-package version for this release.6.0.3+dfsg-1Debian Security Tracker ↗Source updated 5 Oct 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-0335

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

What

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Why

The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

ctorName in index.js in kind-of v6.0.2 allows external user input to overwrite certain internal attributes via a conflicting name, as demonstrated by 'constructor': {'name':'Symbol'}. Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Why

The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Exposure of Resource to Wrong Sphere → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-668 ↗

CWE-668: Exposure of Resource to Wrong Sphere. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-668Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-1591Juniper JUNOS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2023-1350Splunk Splunk Enterprise: Mehrere Schwachstellen in Komponenten von Drittanbietern

Ein Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise in diversen Komponenten von Drittanbietern ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1072Multiples vulnérabilités dans les produits IBM

s. Solutions Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité IBM 7253227 du 01 décembre 2025 https://www.ibm.com/support/pages/node/7253227 Bulletin de sécurité IBM 7253232 du 01 décembre 2025 https://www.ibm.com/support/pages/node/7253232 Bulletin de sécurité IBM 7253254 du 01 décembre 2025 https://www.ibm.com/support/pages/node/7253254 Bulletin de sécurité IBM 7253281 du 01 décembre 2025 https://www.ibm.com/support/pages/node/7253281 Bulletin de sécurité IBM 7253432 du 02 décembre 2025 https://www.ibm.com/support/pages/node/7253432 Référence CVE CVE-2019-20149 https://www.cve.org/CVERecord?id=CVE-2019-20149 Référence CVE CVE-2023-39017 https://www.cve.org/CVERecord?id=CVE-2023-39017 Référence CVE CVE-2024-12905 https://www.cve.org/CVERecord?id=CVE-2024-12905 Référence CVE CVE-2024-45296 https://www.cve.org/CVERecord?id=CVE-2024-45296 Référence CVE CVE-2024-47764 https://www.cve.org/CVERecord?id=CVE-2024-47764 Référence CVE CVE-2024-52798 https://www.cve.org/CVERecord?id=CVE-2024-52798 Référence CVE CVE-2024-55565 https://www.cve.org/CVERecord?id=CVE-2024-55565 Référence CVE CVE-2025-12758 https://www.cve.org/CVERecord?id=CVE-2025-12758 Référence CVE CVE-2025-27152 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0575Multiples vulnérabilités dans les produits Juniper Networks

d?id=CVE-2019-11719 Référence CVE CVE-2019-11727 https://www.cve.org/CVERecord?id=CVE-2019-11727 Référence CVE CVE-2019-11756 https://www.cve.org/CVERecord?id=CVE-2019-11756 Référence CVE CVE-2019-16775 https://www.cve.org/CVERecord?id=CVE-2019-16775 Référence CVE CVE-2019-16776 https://www.cve.org/CVERecord?id=CVE-2019-16776 Référence CVE CVE-2019-16777 https://www.cve.org/CVERecord?id=CVE-2019-16777 Référence CVE CVE-2019-17006 https://www.cve.org/CVERecord?id=CVE-2019-17006 Référence CVE CVE-2019-17023 https://www.cve.org/CVERecord?id=CVE-2019-17023 Référence CVE CVE-2019-17567 https://www.cve.org/CVERecord?id=CVE-2019-17567 Référence CVE CVE-2019-20149 https://www.cve.org/CVERecord?id=CVE-2019-20149 Référence CVE CVE-2019-9517 https://www.cve.org/CVERecord?id=CVE-2019-9517 Référence CVE CVE-2020-11668 https://www.cve.org/CVERecord?id=CVE-2020-11668 Référence CVE CVE-2020-11984 https://www.cve.org/CVERecord?id=CVE-2020-11984 Référence CVE CVE-2020-11993 https://www.cve.org/CVERecord?id=CVE-2020-11993 Référence CVE CVE-2020-12362 https://www.cve.org/CVERecord?id=CVE-2020-12362 Référence CVE CVE-2020-12400 https://www.cve.org/CVERecord?id=CVE-2020-12400 Référence CVE CVE-2020-12401 https://www.cve.org/CVERecord?id=CVE-2020-12401 Référence CVE CVE-2020-12402 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0428Multiples vulnérabilités dans les produits Splunk

tin de sécurité Splunk SVD-2023-0613 du 01 juin 2023 https://advisory.splunk.com/advisories/SVD-2023-0613 Bulletin de sécurité Splunk SVD-2023-0614 du 01 juin 2023 https://advisory.splunk.com/advisories/SVD-2023-0614 Bulletin de sécurité Splunk SVD-2023-0615 du 01 juin 2023 https://advisory.splunk.com/advisories/SVD-2023-0615 Référence CVE CVE-2017-16042 https://www.cve.org/CVERecord?id=CVE-2017-16042 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2019-10744 https://www.cve.org/CVERecord?id=CVE-2019-10744 Référence CVE CVE-2019-10746 https://www.cve.org/CVERecord?id=CVE-2019-10746 Référence CVE CVE-2019-20149 https://www.cve.org/CVERecord?id=CVE-2019-20149 Référence CVE CVE-2019-8331 https://www.cve.org/CVERecord?id=CVE-2019-8331 Référence CVE CVE-2020-13822 https://www.cve.org/CVERecord?id=CVE-2020-13822 Référence CVE CVE-2020-15138 https://www.cve.org/CVERecord?id=CVE-2020-15138 Référence CVE CVE-2020-28469 https://www.cve.org/CVERecord?id=CVE-2020-28469 Référence CVE CVE-2020-7662 https://www.cve.org/CVERecord?id=CVE-2020-7662 Référence CVE CVE-2020-7753 https://www.cve.org/CVERecord?id=CVE-2020-7753 Référence CVE CVE-2020-7774 https://www.cve.org/CVERecord?id=CVE-2020-7774 Référence CVE CVE-2020-8116 https://www.cve.org/CVERecord?id=CVE-2020-

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2019-014088kind-of におけるインジェクションに関する脆弱性

kind-of には、インジェクションに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

04

Evidence and provenance

Published 30 Dec 2019 · Last source change 5 Aug 2024, 02:39 UTC · CWE-668 · Exposure of Resource to Wrong Sphere

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2020-0335
Product sourceUnavailable
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2020-0335 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2020-0335"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added patch: github.com/31; added remediation: github.com/31.
    Before
    no authoritative guidance recorded
    After
    patch: github.com/31 · remediation: github.com/31
    github.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    n/a · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    n/a · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    github.com ↗
  5. Public exploit evidencePublic exploit evidence changed from No public exploit to Public exploit reference.
    Before
    No public exploit
    After
    Public exploit reference
    github.com ↗
  6. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  7. CVSS scoreCVSS score changed from not recorded to 7.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
    Before
    not recorded
    After
    7.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
    NIST NVD ↗
  8. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2019-20149 · cve.blacktree.nl