CVE-2021-20066

MEDIUM

JSDom improperly allows the loading of local resources, which allows for local files to be manipulated by a malicious web page when script execution is enabled.

Affects 1 product across 1 vendor.

CVSS 3.15.6
EPSS1.4%
Percentile72th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, high complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component.
◆ AI Analysis — automated analysis, not human-reviewed

CVE-2021-20066 affects JSDom, allowing malicious web pages to manipulate local files when script execution is enabled.

BSID: BS-2021-GLOBAL-081565-M • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2021-20066?
CVE-2021-20066 affects JSDom, allowing malicious web pages to manipulate local files when script execution is enabled.
What is the CVSS score for CVE-2021-20066?
CVE-2021-20066 has CVSS 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L. EPSS: 1.4%.
Is CVE-2021-20066 actively exploited?
No confirmed active exploitation of CVE-2021-20066 as of 2026-05-30.
How do I remediate CVE-2021-20066?
Priority: MEDIUM.
What systems are affected by CVE-2021-20066?
CVE-2021-20066 affects Jsdom Project Jsdom.
Vulnerability Details
CVE IDCVE-2021-20066
BSIDBS-2021-GLOBAL-081565-M BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Published2021-02-16
Last Modified2024-11-21
ICS Relevance0%
SourceNVD
Official Description

JSDom improperly allows the loading of local resources, which allows for local files to be manipulated by a malicious web page when script execution is enabled.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

A malicious web page can exploit this vulnerability to load and manipulate local resources, potentially leading to unauthorized access or data leakage.

Exploitation Likelihood: MEDIUM

Affected Products
VendorProductAffected Versions
Jsdom Project Jsdom No version listed by source
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 2067 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashb190670bad7d9081ca1ba71fda9eed78a791732435bb32edf20bad33456fef232f7cbedcc102b9278cbe480e68e63532f043179b4f6cc417327b83b901cc2c5b

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