Back
CVE-2020-7637
class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into…
Medium5.3EPSS 1.2%
- Published
- Updated
- Reserved
- Assigned by
- snyk
Description
class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
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)
- 1.2% · top 32% of all CVEs (6 Nov 2026)
Loading the EPSS history…
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
class-transformer
- affected All versions prior to version 0.3.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmclass-transformerGHSA-6gp3-h3jj-prx4 (opens in a new tab)
References (2)
- https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e (opens in a new tab)x_refsource_MISCx_transferred
- https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431 (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-6gp3-h3jj-prx4 (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-2020-7637)Record last updated .