What’s Vulnerable › Vulnerabilities

CVE-2020-7707: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-08-18 · updated 2026-06-17
• Weakness: CWE-1321

Description

The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.

Affected products

• property-expr: before 2.0.3 — fixed in 2.0.3

How to fix

Upgrade to a fixed version: property-expr 2.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/jquense/expr/commit/df846910915d59f711ce63c1f817815bceab5ff7
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-598857
• https://snyk.io/vuln/SNYK-JS-PROPERTYEXPR-598800
• https://github.com/jquense/expr/commit/df846910915d59f711ce63c1f817815bceab5ff7
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-598857
• https://snyk.io/vuln/SNYK-JS-PROPERTYEXPR-598800

Get alerted when CVE-2020-7707 or the next vulnerability affects your stack