🛡️ CVE-2021-39227 — zrender

⚪ Unknown ✅ No Known Exploit CWE-1321 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Prototype Pollution in the merge and clone helper methods

Impact

Using merge and clone helper methods in the src/core/util.ts module will have prototype pollution. It will affect the popular data visualization library Apache ECharts, which is using and exported these two methods directly.

Patches

It has been patched in https://github.com/ecomfe/zrender/pull/826.

Users should update zrender to 5.2.1. and update echarts to 5.2.1 if project is using echarts.

References

NA

For more information

NA

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2021-39227 is classified as CWE-1321: Prototype Pollution. Attacker input can modify an object prototype, changing behaviour for objects across the application.

Affected software

CVE-2021-39227 is recorded against 1 package.

  • zrender

Timeline and source

Published on 20 September 2021 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-1321
Public Exploit ✅ No
Source OSV
Published 2021-09-20
Updated 2026-08-12
Modified 2026-07-08
Fix URL N/A

Affected Packages

Software From version Fixed in
zrender — —

Free Vulnerability Check

Is your site affected by CVE-2021-39227?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against CVE-2021-39227 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.