CVE-2021-23413

Name: CVE-2021-23413
Creator: NVD / NIST
Published: 2021-07-25T13:15:07.39+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 3.31%

Last modified Jun 17, 2026

CVE-2021-23413 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.. EPSS estimates a 3.31% chance of exploitation in the next 30 days.

Description

This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

3.31%

87.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Jszip Project	Jszip	< 3.7.0

References

https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88Broken Link
https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36Patch, Third Party Advisory
https://github.com/Stuk/jszip/pull/766Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSZIP-1251497Exploit, Patch, Third Party Advisory
https://github.com/Stuk/jszip/blob/master/lib/object.js%23L88Broken Link
https://github.com/Stuk/jszip/commit/22357494f424178cb416cdb7d93b26dd4f824b36Patch, Third Party Advisory
https://github.com/Stuk/jszip/pull/766Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1251499Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1251498Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSZIP-1251497Exploit, Patch, Third Party Advisory

Timeline

Published: Jul 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23413?

How severe is CVE-2021-23413?

CVE-2021-23413 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 3.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23413?

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-2021-23413?

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

Scan your code now

Source: NVD / NIST