HOMEVULNERABILITIESCVE-2018-3721
MEDIUM

CVE-2018-3721

CWE-471Published: June 7, 2018· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-3721 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

lodash1 product(s)
lodash
netapp2 product(s)
active iq unified managersystem manager
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a
PATCHhttps://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a
ADVISORYhttps://hackerone.com/reports/310443
ADVISORYhttps://security.netapp.com/advisory/ntap-20190919-0004/
ADVISORYhttps://hackerone.com/reports/310443
ADVISORYhttps://security.netapp.com/advisory/ntap-20190919-0004/

All References (6)

→
https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4aPatch
→
https://hackerone.com/reports/310443Exploit · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20190919-0004/Third Party Advisory
→
https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4aPatch
→
https://hackerone.com/reports/310443Exploit · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20190919-0004/Third Party Advisory

Quick Facts

CVE IDCVE-2018-3721
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-471
CISA KEVNo
Affected2 vendor(s)
PublishedJun 7, 2018

Related CVEs (CWE-471)

CVE-2020-8147
9.8
CVE-2020-8158
9.8
CVE-2018-3722
8.8
CVE-2018-3723
8.8
CVE-2018-3720
8.8
CVE-2018-3719
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-3721 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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