Prototype Pollution in HackerOne Lodash Node Module

CVE-2018-3721

lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith functions, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.023 (83.7th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.7% 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-2018-3721: held from 0.024 to 0.023.

EPSS over last 30 days · oldest: 0.024 · newest: 0.023 · change: -0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-3721?
CVE-2018-3721 is a medium-severity vulnerability in HackerOne Lodash Node Module, classified under Modification of Assumed-Immutable Data (MAID). CVSS score: 6.5/10. Published 2018-06-07.
How severe is CVE-2018-3721?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2018-3721 known to be exploited?
17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.