CVE-2021-23444

Prototype Pollution

5.6 MediumFix available

This affects the package jointjs before 3.4.2. A type confusion vulnerability can lead to a bypass of CVE-2020-28480 when the user-provided keys used in the path parameter are arrays in the setByPath function.

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: Low
Integrity: Low
Availability: Low

Exploit likelihood

1.86%Up 0.4 points since Sep 22, 2021

What each source reports

CVE List Score used 5.6

Prototype Pollution

Record: CVE-2021-23444
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Updated: 2026-11-02

EUVDEUVD-2021-2047 5.6

Record: EUVD-2021-2047
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Updated: 2026-11-03

GitHub AdvisoriesGHSA-f3pp-32qc-36w4 5.6

Prototype Pollution in jointjs

Record: GHSA-f3pp-32qc-36w4
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-843, CWE-1321
Updated: 2026-11-02

NVD 5.6

Record: CVE-2021-23444
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-843
Updated: 2026-11-02

OSV 9.8

Record: CVE-2021-23444
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-f3pp-32qc-36w4 5.6

Prototype Pollution in jointjs

Record: GHSA-f3pp-32qc-36w4
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-1321, CWE-843
Updated: 2026-11-02

Affected products

client jointjs

Affected packages

Affected packages
Package	Affected	Fixed
`jointjs` npm	before 3.4.2	3.4.2

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2021-23444 is a medium vulnerability (CVSS 5.6) in Client Jointjs, published September 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.86%, the 79th percentile. Fixed in jointjs 3.4.2.