CVE-2020-7637

PoC —

CVSS 3.1

5.3 medium

EPSS

1%p66

Published

Apr 6, 2020 (Apr 6, 2020)

Modified

Jun 17, 2026

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.

Vendors: class-transformer project
Products: class-transformer
Weakness: CWE-1321
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (1.2%)

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