CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NCVE-2020-7637
Medium (5.3) in class-transformer project class-transformer. EPSS 1.2% chance of exploitation in the next 30 days. Fixed in class-transformer 0.3.1.
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.
Severity
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1321
- Published
- Modified
- Record from
- the NVD, synced
Affected
- class-transformer_project:class-transformer
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6gp3-h3jj-prx4 | npm | class-transformer | <0.3.1 | 0.3.1 |