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Vulnerability details: VCID-35d9-a9uc-63h5
Vulnerability ID VCID-35d9-a9uc-63h5
Aliases CVE-2020-14966
GHSA-p8c3-7rj8-q963
Summary ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding in jsrsasign
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-347 Improper Verification of Cryptographic Signature
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 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2020-14966
epss 0.0028 https://api.first.org/data/v1/epss?cve=CVE-2020-14966
cvssv3.1 7.5 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14966
generic_textual HIGH https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14966
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-p8c3-7rj8-q963
cvssv3.1 7.5 https://github.com/kjur/jsrsasign
generic_textual HIGH https://github.com/kjur/jsrsasign
cvssv3.1 7.5 https://github.com/kjur/jsrsasign/commit/6087412d072a57074d3c4c1b40bdde0460d53a7f
generic_textual HIGH https://github.com/kjur/jsrsasign/commit/6087412d072a57074d3c4c1b40bdde0460d53a7f
cvssv3.1 7.5 https://github.com/kjur/jsrsasign/issues/437
generic_textual HIGH https://github.com/kjur/jsrsasign/issues/437
cvssv3.1 7.5 https://github.com/kjur/jsrsasign/releases/tag/8.0.17
generic_textual HIGH https://github.com/kjur/jsrsasign/releases/tag/8.0.17
cvssv3.1 7.5 https://github.com/kjur/jsrsasign/releases/tag/8.0.18
generic_textual HIGH https://github.com/kjur/jsrsasign/releases/tag/8.0.18
cvssv3.1 7.5 https://github.com/kjur/jsrsasign/security/advisories/GHSA-p8c3-7rj8-q963
cvssv3.1_qr HIGH https://github.com/kjur/jsrsasign/security/advisories/GHSA-p8c3-7rj8-q963
generic_textual HIGH https://github.com/kjur/jsrsasign/security/advisories/GHSA-p8c3-7rj8-q963
cvssv3.1 7.5 https://kjur.github.io/jsrsasign
generic_textual HIGH https://kjur.github.io/jsrsasign
cvssv3.1 7.5 https://kjur.github.io/jsrsasign/api/symbols/ASN1HEX.html#.checkStrictDER
generic_textual HIGH https://kjur.github.io/jsrsasign/api/symbols/ASN1HEX.html#.checkStrictDER
cvssv3.1 7.5 https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.ECDSA.html
generic_textual HIGH https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.ECDSA.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-14966
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-14966
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20200724-0001
generic_textual HIGH https://security.netapp.com/advisory/ntap-20200724-0001
cvssv3.1 7.5 https://vuldb.com/?id.157123
generic_textual HIGH https://vuldb.com/?id.157123
cvssv3.1 7.5 https://www.npmjs.com/package/jsrsasign
generic_textual HIGH https://www.npmjs.com/package/jsrsasign
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-14966
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14966
https://github.com/kjur/jsrsasign
https://github.com/kjur/jsrsasign/commit/6087412d072a57074d3c4c1b40bdde0460d53a7f
https://github.com/kjur/jsrsasign/issues/437
https://github.com/kjur/jsrsasign/releases/tag/8.0.17
https://github.com/kjur/jsrsasign/releases/tag/8.0.18
https://kjur.github.io/jsrsasign
https://kjur.github.io/jsrsasign/
https://kjur.github.io/jsrsasign/api/symbols/ASN1HEX.html#.checkStrictDER
https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.ECDSA.html
https://security.netapp.com/advisory/ntap-20200724-0001
https://security.netapp.com/advisory/ntap-20200724-0001/
https://vuldb.com/?id.157123
https://www.npmjs.com/package/jsrsasign
CVE-2020-14966 https://nvd.nist.gov/vuln/detail/CVE-2020-14966
GHSA-p8c3-7rj8-q963 https://github.com/advisories/GHSA-p8c3-7rj8-q963
GHSA-p8c3-7rj8-q963 https://github.com/kjur/jsrsasign/security/advisories/GHSA-p8c3-7rj8-q963
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14966
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

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required

unchanged

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low

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign/commit/6087412d072a57074d3c4c1b40bdde0460d53a7f
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

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physical

low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign/issues/437
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

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unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign/releases/tag/8.0.17
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign/releases/tag/8.0.18
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

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required

unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/kjur/jsrsasign/security/advisories/GHSA-p8c3-7rj8-q963
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

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none

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low

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://kjur.github.io/jsrsasign
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

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none

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low

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://kjur.github.io/jsrsasign/api/symbols/ASN1HEX.html#.checkStrictDER
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

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required

unchanged

changed

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low

none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.ECDSA.html
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

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-14966
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

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://security.netapp.com/advisory/ntap-20200724-0001
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

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none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://vuldb.com/?id.157123
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

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high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://www.npmjs.com/package/jsrsasign
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

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low

none

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none
Exploit Prediction Scoring System (EPSS)
Percentile 0.51672
EPSS Score 0.0028
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:26:18.492965+00:00 GHSA Importer Import https://github.com/advisories/GHSA-p8c3-7rj8-q963 38.6.0