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CVE-2020-7644

25
FAUCET Score

CVE-2020-7644 describes a Prototype Pollution vulnerability in the fun-map library, specifically affecting versions up to 3.3.1. An attacker can exploit the assocInM function by injecting a '__proto__' payload, allowing them to add or modify properties of Object.prototype. This vulnerability carries a high CVSS score of 8.1, indicating a severe impact with high confidentiality, integrity, and availability risks, and can be exploited remotely with high attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.3.1CPE matchmatch criteria
cpe:2.3:a:fun-map_project:fun-map:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.22%
Probability of exploitation in next 30 days
EPSS Percentile
65.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0122 is in the 26th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-p33m-7w7f-gmj8high

Uncontrolled Resource Consumption in fun-map

Dec 10, 2021

References

github.com / nathan7/fun-map/blob/master/index.js
snyk.io / vuln/SNYK-JS-FUNMAP-564436
ExploitMitigationThird Party Advisory