Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-39227

6.2 · MEDIUM

ZRender is a lightweight graphic library providing 2d draw for Apache ECharts.

Published Sep 17, 2021CWE-1321EPSS 1.39%

Overview

CVE-2021-39227 is a medium-severity vulnerability. It was published on September 17, 2021 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

ZRender is a lightweight graphic library providing 2d draw for Apache ECharts. In versions prior to 5.2.1, using `merge` and `clone` helper methods in the `src/core/util.ts` module results in prototype pollution. It affects the popular data visualization library Apache ECharts, which uses and exports these two methods directly. The GitHub Security Advisory page for this vulnerability contains a proof of concept. This issue is patched in ZRender version 5.2.1. One workaround is available: Check if there is `__proto__` in the object keys. Omit it before using it as an parameter in these affected methods. Or in `echarts.util.merge` and `setOption` if project is using ECharts.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/ecomfe/zrender/pull/826GitHubgithub.com/ecomfe/zrender/releases/tag/5.2.1GitHubgithub.com/ecomfe/zrender/security/advisories/GHSA-fhv8-fx5f-7fxfGitHubgithub.com/ecomfe/zrender/pull/826GitHubgithub.com/ecomfe/zrender/releases/tag/5.2.1GitHubgithub.com/ecomfe/zrender/security/advisories/GHSA-fhv8-fx5f-7fxf

How CyberStrike helps

Frequently asked questions

What is CVE-2021-39227?

CVE-2021-39227 is a medium-severity vulnerability. It was published on September 17, 2021 and has a CVSS 3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2021-39227?

This vulnerability has a CVSS 3.1 base score of 6.2, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-39227?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-39227?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-39227 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999