What’s Vulnerable › Vulnerabilities

CVE-2021-23444: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-21 · updated 2026-06-17
• Weakness: CWE-843

Description

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.

Affected products

• Client Jointjs: before 3.4.2 — fixed in 3.4.2

How to fix

Upgrade to a fixed version: Client Jointjs 3.4.2. Check the vendor advisory for mitigations.

References

• https://github.com/clientIO/joint/commit/e5bf89efef6d5ea572d66870ffd86560de7830a8
• https://github.com/clientIO/joint/pull/1514
• https://github.com/clientIO/joint/releases/tag/v3.4.2
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1655817
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1655816
• https://snyk.io/vuln/SNYK-JS-JOINTJS-1579578
• https://github.com/clientIO/joint/commit/e5bf89efef6d5ea572d66870ffd86560de7830a8
• https://github.com/clientIO/joint/pull/1514
• https://github.com/clientIO/joint/releases/tag/v3.4.2
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1655817
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1655816
• https://snyk.io/vuln/SNYK-JS-JOINTJS-1579578

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