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CVE-2020-7616
express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding…
Medium5.3EPSS 1.3%
- Published
- Updated
- Reserved
- Assigned by
- snyk
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.3% · top 30% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- Prototype Pollution
- CWE-1321 (opens in a new tab)All about CWE-1321 and its CVEs
Affected products
express-mock-middleware
- affected All versions including 0.0.6
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmexpress-mock-middlewareGHSA-v39h-qm32-8gwq (opens in a new tab)
References (2)
- https://snyk.io/vuln/SNYK-JS-EXPRESSMOCKMIDDLEWARE-564120 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/LingyuCoder/express-mock-middleware/blob/master/lib/index.js#L39 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-v39h-qm32-8gwq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-7616)Record last updated .