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Vulnerability details: VCID-qqdn-ahv8-hugs
Vulnerability ID VCID-qqdn-ahv8-hugs
Aliases CVE-2021-23663
GHSA-wjpc-cgvw-xx23
Summary Prototype Pollution in sey
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00477 https://api.first.org/data/v1/epss?cve=CVE-2021-23663
epss 0.00477 https://api.first.org/data/v1/epss?cve=CVE-2021-23663
epss 0.00477 https://api.first.org/data/v1/epss?cve=CVE-2021-23663
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-wjpc-cgvw-xx23
cvssv3.1 6.5 https://github.com/eserozvataf/sey
generic_textual MODERATE https://github.com/eserozvataf/sey
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-23663
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-23663
cvssv3.1 6.5 https://snyk.io/vuln/SNYK-JS-SEY-1727592
generic_textual MODERATE https://snyk.io/vuln/SNYK-JS-SEY-1727592
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-23663
https://github.com/eserozvataf/sey
https://snyk.io/vuln/SNYK-JS-SEY-1727592
CVE-2021-23663 https://nvd.nist.gov/vuln/detail/CVE-2021-23663
GHSA-wjpc-cgvw-xx23 https://github.com/advisories/GHSA-wjpc-cgvw-xx23
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Found at https://github.com/eserozvataf/sey
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23663
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Found at https://snyk.io/vuln/SNYK-JS-SEY-1727592
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.65398
EPSS Score 0.00477
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:22.074658+00:00 GHSA Importer Import https://github.com/advisories/GHSA-wjpc-cgvw-xx23 38.6.0