VulnerabilityModified
CVE-2020-7637
class-transformer before 0.3.1 allow attackers to perform Prototype Pollution.
MEDIUM 5.3EPSS 1.19%
Does this matter?
Lower severity and a low EPSS score (1.19%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.19% probability · 68th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-1321
- Affected
- class-transformer project/class-transformer
- Source
- report@snyk.io
EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01ePatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431Exploit, Third Party Advisory
- https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01ePatch, Third Party Advisory
- https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.