CVE-2020-7637
MEDIUM
5.3
CVSS Score
Published: April 6, 2020 at 12:34 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
1 product affected across 1 vendorClass Transformer
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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 0.3.1
Affected range stops below 0.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01ex_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1321
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