BlackTreeCVE Intelligence
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Full vulnerability report · 2021
CVE-2021-27568High confidence

An issue was discovered in netplex json-smart-v1 through 2015-10-23 and json-smart-v2 through 2.4

Unknown · Unknown

5.9MediumCVSS 3.1
Recommended action
Within 7 days

Medium 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 severityMediumOperational priority:High, raised one band.upgradedsince 3 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 2.90% 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 30 daysRemediation target: Within 180 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.

Open-source package ranges4 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
Mavennet.minidev:json-smartECOSYSTEM: introduced 0; fixed 1.3.21.3.2OSV record ↗aggregator derived · 10 Sep 2026
Mavennet.minidev:json-smartECOSYSTEM: introduced 2.4.0; fixed 2.4.12.4.1OSV record ↗aggregator derived · 10 Sep 2026
Mavennet.minidev:json-smartECOSYSTEM: introduced 2.0.0; fixed 2.3.12.3.1OSV record ↗aggregator derived · 10 Sep 2026
Mavennet.minidev:json-smart-miniECOSYSTEM: introduced 0; fixed 1.3.21.3.2OSV record ↗aggregator derived · 10 Sep 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-2021-1405

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

Medium 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

An issue was discovered in netplex json-smart-v1 through 2015-10-23 and json-smart-v2 through 2.4. An exception is thrown from a function, but it is not caught, as demonstrated by NumberFormatException. When it is not caught, it may cause programs using the library to crash or expose sensitive information.

What

An issue was discovered in netplex json-smart-v1 through 2015-10-23 and json-smart-v2 through 2.4. An exception is thrown from a function, but it is not caught, as demonstrated by NumberFormatException. When it is not caught, it may cause programs using the library to crash or expose sensitive information.

Why

The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

An issue was discovered in netplex json-smart-v1 through 2015-10-23 and json-smart-v2 through 2.4. An exception is thrown from a function, but it is not caught, as demonstrated by NumberFormatException. When it is not caught, it may cause programs using the library to crash or expose sensitive information.

Why

The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

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 → Improper Check for Unusual or Exceptional Conditions → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
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-754 ↗

CWE-754: Improper Check for Unusual or Exceptional Conditions. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

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:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
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.
NetworkUnauthenticatedDenial of serviceCWE-754Public 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-2026-0180Dell Data Protection Advisor: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen und nicht näher spezifizierte Angriffe zu starten.

Official advisory ↗
BSI · German · WID-SEC-2022-1375JFrog Artifactory: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in JFrog Artifactory ausnutzen, um seine Privilegien zu erweitern, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen und einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20210224Security Bulletin 24 Feb 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 24 Feb 2021, published on 24 February 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1165Multiples vulnérabilités dans les produits IBM

cord?id=CVE-2020-9480 Référence CVE CVE-2020-9492 https://www.cve.org/CVERecord?id=CVE-2020-9492 Référence CVE CVE-2021-21290 https://www.cve.org/CVERecord?id=CVE-2021-21290 Référence CVE CVE-2021-21295 https://www.cve.org/CVERecord?id=CVE-2021-21295 Référence CVE CVE-2021-21409 https://www.cve.org/CVERecord?id=CVE-2021-21409 Référence CVE CVE-2021-22569 https://www.cve.org/CVERecord?id=CVE-2021-22569 Référence CVE CVE-2021-22570 https://www.cve.org/CVERecord?id=CVE-2021-22570 Référence CVE CVE-2021-23337 https://www.cve.org/CVERecord?id=CVE-2021-23337 Référence CVE CVE-2021-23369 https://www.cve.org/CVERecord?id=CVE-2021-23369 Référence CVE CVE-2021-27568 https://www.cve.org/CVERecord?id=CVE-2021-27568 Référence CVE CVE-2021-31684 https://www.cve.org/CVERecord?id=CVE-2021-31684 Référence CVE CVE-2021-33036 https://www.cve.org/CVERecord?id=CVE-2021-33036 Référence CVE CVE-2021-35515 https://www.cve.org/CVERecord?id=CVE-2021-35515 Référence CVE CVE-2021-35516 https://www.cve.org/CVERecord?id=CVE-2021-35516 Référence CVE CVE-2021-35517 https://www.cve.org/CVERecord?id=CVE-2021-35517 Référence CVE CVE-2021-36090 https://www.cve.org/CVERecord?id=CVE-2021-36090 Référence CVE CVE-2021-37136 https://www.cve.org/CVERecord?id=CVE-2021-37136 Référence CVE CVE-2021-37137 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-568Multiples vulnérabilités dans les produits IBM

org/CVERecord?id=CVE-2020-36188 Référence CVE CVE-2020-36189 https://www.cve.org/CVERecord?id=CVE-2020-36189 Référence CVE CVE-2020-8022 https://www.cve.org/CVERecord?id=CVE-2020-8022 Référence CVE CVE-2020-8840 https://www.cve.org/CVERecord?id=CVE-2020-8840 Référence CVE CVE-2020-8908 https://www.cve.org/CVERecord?id=CVE-2020-8908 Référence CVE CVE-2020-9546 https://www.cve.org/CVERecord?id=CVE-2020-9546 Référence CVE CVE-2020-9547 https://www.cve.org/CVERecord?id=CVE-2020-9547 Référence CVE CVE-2020-9548 https://www.cve.org/CVERecord?id=CVE-2020-9548 Référence CVE CVE-2021-20190 https://www.cve.org/CVERecord?id=CVE-2021-20190 Référence CVE CVE-2021-27568 https://www.cve.org/CVERecord?id=CVE-2021-27568 Référence CVE CVE-2021-29425 https://www.cve.org/CVERecord?id=CVE-2021-29425 Référence CVE CVE-2021-33813 https://www.cve.org/CVERecord?id=CVE-2021-33813 Référence CVE CVE-2021-38153 https://www.cve.org/CVERecord?id=CVE-2021-38153 Référence CVE CVE-2021-44228 https://www.cve.org/CVERecord?id=CVE-2021-44228 Référence CVE CVE-2021-45046 https://www.cve.org/CVERecord?id=CVE-2021-45046 Référence CVE CVE-2021-45105 https://www.cve.org/CVERecord?id=CVE-2021-45105 Référence CVE CVE-2022-22965 https://www.cve.org/CVERecord?id=CVE-2022-22965 Gestion détaillée du document le 17 juin 2022 Version initiale

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-056Multiples vulnérabilités dans Oracle WebLogic Server

ectifs (cf. section Documentation). Documentation Bulletin de sécurité Oracle cpujan2022.html du 18 janvier 2022 https://www.oracle.com/security-alerts/cpujan2022.html#AppendixFMW Référence CVE CVE-2018-1324 https://www.cve.org/CVERecord?id=CVE-2018-1324 Référence CVE CVE-2019-10219 https://www.cve.org/CVERecord?id=CVE-2019-10219 Référence CVE CVE-2020-11023 https://www.cve.org/CVERecord?id=CVE-2020-11023 Référence CVE CVE-2020-13956 https://www.cve.org/CVERecord?id=CVE-2020-13956 Référence CVE CVE-2020-2934 https://www.cve.org/CVERecord?id=CVE-2020-2934 Référence CVE CVE-2020-5258 https://www.cve.org/CVERecord?id=CVE-2020-5258 Référence CVE CVE-2021-27568 https://www.cve.org/CVERecord?id=CVE-2021-27568 Référence CVE CVE-2021-29425 https://www.cve.org/CVERecord?id=CVE-2021-29425 Référence CVE CVE-2021-4104 https://www.cve.org/CVERecord?id=CVE-2021-4104 Référence CVE CVE-2021-44832 https://www.cve.org/CVERecord?id=CVE-2021-44832 Référence CVE CVE-2022-21252 https://www.cve.org/CVERecord?id=CVE-2022-21252 Référence CVE CVE-2022-21257 https://www.cve.org/CVERecord?id=CVE-2022-21257 Référence CVE CVE-2022-21258 https://www.cve.org/CVERecord?id=CVE-2022-21258 Référence CVE CVE-2022-21259 https://www.cve.org/CVERecord?id=CVE-2022-21259 Référence CVE CVE-2022-21260 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-951Multiples vulnérabilités dans le noyau Linux de RedHat

d?id=CVE-2021-21347 Référence CVE CVE-2021-21348 https://www.cve.org/CVERecord?id=CVE-2021-21348 Référence CVE CVE-2021-21349 https://www.cve.org/CVERecord?id=CVE-2021-21349 Référence CVE CVE-2021-21350 https://www.cve.org/CVERecord?id=CVE-2021-21350 Référence CVE CVE-2021-21351 https://www.cve.org/CVERecord?id=CVE-2021-21351 Référence CVE CVE-2021-21409 https://www.cve.org/CVERecord?id=CVE-2021-21409 Référence CVE CVE-2021-22118 https://www.cve.org/CVERecord?id=CVE-2021-22118 Référence CVE CVE-2021-22696 https://www.cve.org/CVERecord?id=CVE-2021-22696 Référence CVE CVE-2021-23926 https://www.cve.org/CVERecord?id=CVE-2021-23926 Référence CVE CVE-2021-27568 https://www.cve.org/CVERecord?id=CVE-2021-27568 Référence CVE CVE-2021-28163 https://www.cve.org/CVERecord?id=CVE-2021-28163 Référence CVE CVE-2021-28164 https://www.cve.org/CVERecord?id=CVE-2021-28164 Référence CVE CVE-2021-28169 https://www.cve.org/CVERecord?id=CVE-2021-28169 Référence CVE CVE-2021-28170 https://www.cve.org/CVERecord?id=CVE-2021-28170 Référence CVE CVE-2021-29425 https://www.cve.org/CVERecord?id=CVE-2021-29425 Référence CVE CVE-2021-30129 https://www.cve.org/CVERecord?id=CVE-2021-30129 Référence CVE CVE-2021-30468 https://www.cve.org/CVERecord?id=CVE-2021-30468 Référence CVE CVE-2021-34428 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-559Multiples vulnérabilités dans Oracle PeopleSoft

De multiples vulnérabilités ont été découvertes dans Oracle PeopleSoft. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, un contournement de la politique de sécurité et une atteinte à l'intégrité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-505Multiples vulnérabilités dans IBM Spectrum

De multiples vulnérabilités ont été découvertes dans IBM Spectrum. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-002971netplex json-smart-v1 および json-smart-v2 における例外的な状態のチェックに関する脆弱性

netplex json-smart-v1 および json-smart-v2 には、例外的な状態のチェック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.
04

Evidence and provenance

Published 23 Feb 2021 · Last source change 3 Aug 2024, 21:26 UTC · CWE-754 · Improper Check for Unusual or Exceptional Conditions

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 2026-08-14
European sourceENISA EUVD · EUVD-2021-1405
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 ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-1405↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Public exploit reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
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-2021-27568 · cve.blacktree.nl