CVE-2021-23771: Sandbox Bypass

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-03-17 · updated 2026-06-17
Weakness: CWE-1321

Description

This affects all versions of package notevil; all versions of package argencoders-notevil. It is vulnerable to Sandbox Escape leading to Prototype pollution. The package fails to restrict access to the main context, allowing an attacker to add or modify an object's prototype. **Note:** This vulnerability derives from an incomplete fix in [SNYK-JS-NOTEVIL-608878](https://security.snyk.io/vuln/SNYK-JS-NOTEVIL-608878).

Affected products

Argencoders-Notevil Project Argencoders-Notevil: through 2.5.0
Notevil Project Notevil: through 1.3.3

References

https://snyk.io/vuln/SNYK-JS-ARGENCODERSNOTEVIL-2388587
https://snyk.io/vuln/SNYK-JS-NOTEVIL-2385946
https://snyk.io/vuln/SNYK-JS-ARGENCODERSNOTEVIL-2388587
https://snyk.io/vuln/SNYK-JS-NOTEVIL-2385946

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