What’s Vulnerable › Vulnerabilities

CVE-2020-7743: Prototype Pollution

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-10-13 · updated 2026-06-17
• Weakness: CWE-1321

Description

The package mathjs before 7.5.1 are vulnerable to Prototype Pollution via the deepExtend function that runs upon configuration updates.

Affected products

• josdejong mathjs: before 7.5.1 — fixed in 7.5.1

How to fix

Upgrade to a fixed version: josdejong mathjs 7.5.1. Check the vendor advisory for mitigations.

References

• https://github.com/josdejong/mathjs/blob/develop/src/utils/object.js%23L82
• https://github.com/josdejong/mathjs/commit/ecb80514e80bce4e6ec7e71db8ff79954f07c57e
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1017113
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1017112
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1017111
• https://snyk.io/vuln/SNYK-JS-MATHJS-1016401
• https://github.com/josdejong/mathjs/blob/develop/src/utils/object.js%23L82
• https://github.com/josdejong/mathjs/commit/ecb80514e80bce4e6ec7e71db8ff79954f07c57e
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1017113
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1017112
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1017111
• https://snyk.io/vuln/SNYK-JS-MATHJS-1016401

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