CVE-2020-7743

Name: CVE-2020-7743
Creator: NVD / NIST
Published: 2020-10-13T10:15:13.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 3.88%

Last modified Jun 17, 2026

CVE-2020-7743 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. The package mathjs before 7.5.1 are vulnerable to Prototype Pollution via the deepExtend function that runs upon configuration updates.. EPSS estimates a 3.88% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Probability

3.88%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Mathjs	Mathjs	< 7.5.1

References

https://github.com/josdejong/mathjs/blob/develop/src/utils/object.js%23L82Broken Link, Third Party Advisory
https://github.com/josdejong/mathjs/commit/ecb80514e80bce4e6ec7e71db8ff79954f07c57ePatch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1017113Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1017112Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1017111Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-MATHJS-1016401Exploit, Mitigation, Third Party Advisory
https://github.com/josdejong/mathjs/blob/develop/src/utils/object.js%23L82Broken Link, Third Party Advisory
https://github.com/josdejong/mathjs/commit/ecb80514e80bce4e6ec7e71db8ff79954f07c57ePatch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1017113Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1017112Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1017111Exploit, Mitigation, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-MATHJS-1016401Exploit, Mitigation, Third Party Advisory

Timeline

Published: Oct 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7743?

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

How severe is CVE-2020-7743?

CVE-2020-7743 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 3.88% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7743?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7743?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST