What’s Vulnerable › Vulnerabilities

CVE-2020-7616

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-04-07 · updated 2026-06-17
• Weakness: CWE-1321

Description

express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the `Object.prototype`. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by `express-mock-middleware`. As such, this is considered to be a low risk.

Affected products

• express-mock-middleware: through 0.0.6

References

• https://github.com/LingyuCoder/express-mock-middleware/blob/master/lib/index.js#L39
• https://snyk.io/vuln/SNYK-JS-EXPRESSMOCKMIDDLEWARE-564120
• https://github.com/LingyuCoder/express-mock-middleware/blob/master/lib/index.js#L39
• https://snyk.io/vuln/SNYK-JS-EXPRESSMOCKMIDDLEWARE-564120

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