Prototype Pollution in Yargs Yargs-Parser

CVE-2020-7608

yargs-parser could be tricked into adding or modifying properties of Object.prototype using a "__proto__" payload.

Vulnerability class: Prototype Pollution

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (41.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-7608: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Yargs Yargs-Parser
  • Yargs-Parser — versions All versions prior to version 18.1.1 and patches at 13.1.2 and 15.0.1

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-7608?
CVE-2020-7608 is a medium-severity vulnerability in Yargs Yargs-Parser, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 5.3/10. Published 2020-03-16.
How severe is CVE-2020-7608?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2020-7608 known to be exploited?
9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.