What’s Vulnerable › Vulnerabilities

CVE-2020-28503: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-23 · updated 2026-06-17

Description

The package copy-props before 2.0.5 are vulnerable to Prototype Pollution via the main functionality.

Affected products

• copy-props: before 2.0.5 — fixed in 2.0.5

How to fix

Upgrade to a fixed version: copy-props 2.0.5. Check the vendor advisory for mitigations.

References

• https://github.com/gulpjs/copy-props/pull/7
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1088047
• https://snyk.io/vuln/SNYK-JS-COPYPROPS-1082870
• https://github.com/gulpjs/copy-props/pull/7
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1088047
• https://snyk.io/vuln/SNYK-JS-COPYPROPS-1082870

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