CVE-2021-27568

Improper Check for Unusual or Exceptional Conditions in json-smart

5.9 MediumPublic exploitFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.89%Up 2.3 points since Apr 14, 2021

What each source reports

NVD Score used 5.9

Record: CVE-2021-27568
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-754
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-27568
Updated: 2026-11-02

EUVDEUVD-2021-1405 No score

Record: EUVD-2021-1405
Updated: 2026-11-02

GitHub AdvisoriesGHSA-v528-7hrm-frqp 5.9

Improper Check for Unusual or Exceptional Conditions in json-smart

Record: GHSA-v528-7hrm-frqp
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-754
Updated: 2026-11-02

OSV 5.9

Record: CVE-2021-27568
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVGHSA-v528-7hrm-frqp 5.9

Improper Check for Unusual or Exceptional Conditions in json-smart

Record: GHSA-v528-7hrm-frqp
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-754
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`net.minidev:json-smart` Maven	before 1.3.2	1.3.2
`net.minidev:json-smart-mini` Maven	before 1.3.2	1.3.2
`net.minidev:json-smart` Maven	2.4.0 up to 2.4.1	2.4.1
`net.minidev:json-smart` Maven	2.0.0 up to 2.3.1	2.3.1
`net.minidev:json-smart` Maven	before 1.3.2, plus listed versions 1.0.6.31.0.81.0.91.0.9-11.1 Show 4 moreShow less 1.1.11.21.31.3.1	1.3.2
`net.minidev:json-smart-mini` Maven	before 1.3.2, plus listed versions 1.0.6.31.0.8	1.3.2
`net.minidev:json-smart` Maven	2.0.0 up to 2.3.1, plus listed versions 2.02.1.02.1.12.22.2.12.3	2.3.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	arsalanraja987/java-insecure-random-cve-2021-27568	2025-07-07

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-27568 is a medium vulnerability (CVSS 5.9) in Json-smart Project Json-smart-v1, published February 23, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.89%, the 86th percentile. Fixed in net.minidev:json-smart 1.3.2.

References

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