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Vulnerability details: VCID-wg6b-e8ts-w7ct
Vulnerability ID VCID-wg6b-e8ts-w7ct
Aliases CVE-2021-31684
GHSA-fg2v-w576-w4v3
Summary Out of bounds read in json-smart A vulnerability was discovered in the indexOf function of JSONParserByteArray in JSON Smart versions prior to 1.3.3 and 2.4.5 which causes a denial of service (DOS) via a crafted web request.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-125 Out-of-bounds Read
CWE-787 Out-of-bounds Write
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
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-31684.json
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
epss 0.00062 https://api.first.org/data/v1/epss?cve=CVE-2021-31684
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-fg2v-w576-w4v3
cvssv3.1 7.5 https://github.com/netplex/json-smart-v1
generic_textual HIGH https://github.com/netplex/json-smart-v1
cvssv3.1 7.5 https://github.com/netplex/json-smart-v1/issues/10
generic_textual HIGH https://github.com/netplex/json-smart-v1/issues/10
ssvc Track https://github.com/netplex/json-smart-v1/issues/10
cvssv3.1 7.5 https://github.com/netplex/json-smart-v1/pull/11
generic_textual HIGH https://github.com/netplex/json-smart-v1/pull/11
ssvc Track https://github.com/netplex/json-smart-v1/pull/11
cvssv3.1 7.5 https://github.com/netplex/json-smart-v2/issues/67
generic_textual HIGH https://github.com/netplex/json-smart-v2/issues/67
ssvc Track https://github.com/netplex/json-smart-v2/issues/67
cvssv3.1 7.5 https://github.com/netplex/json-smart-v2/pull/68
generic_textual HIGH https://github.com/netplex/json-smart-v2/pull/68
ssvc Track https://github.com/netplex/json-smart-v2/pull/68
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
ssvc Track https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-31684
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-31684
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20240621-0006
generic_textual HIGH https://security.netapp.com/advisory/ntap-20240621-0006
ssvc Track https://security.netapp.com/advisory/ntap-20240621-0006/
cvssv3.1 7.5 https://www.oracle.com/security-alerts/cpujan2022.html
generic_textual HIGH https://www.oracle.com/security-alerts/cpujan2022.html
ssvc Track https://www.oracle.com/security-alerts/cpujan2022.html
cvssv3.1 7.5 https://www.oracle.com/security-alerts/cpujul2022.html
generic_textual HIGH https://www.oracle.com/security-alerts/cpujul2022.html
ssvc Track https://www.oracle.com/security-alerts/cpujul2022.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-31684.json
https://api.first.org/data/v1/epss?cve=CVE-2021-31684
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31684
https://github.com/netplex/json-smart-v1
https://github.com/netplex/json-smart-v1/issues/10
https://github.com/netplex/json-smart-v1/pull/11
https://github.com/netplex/json-smart-v2/issues/67
https://github.com/netplex/json-smart-v2/pull/68
https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
https://nvd.nist.gov/vuln/detail/CVE-2021-31684
https://security.netapp.com/advisory/ntap-20240621-0006
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com/security-alerts/cpujul2022.html
2102695 https://bugzilla.redhat.com/show_bug.cgi?id=2102695
GHSA-fg2v-w576-w4v3 https://github.com/advisories/GHSA-fg2v-w576-w4v3
RHSA-2022:8652 https://access.redhat.com/errata/RHSA-2022:8652
USN-6011-1 https://usn.ubuntu.com/6011-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-31684.json
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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none

required

unchanged

changed

high

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none

high

low

none

high

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/netplex/json-smart-v1
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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none

required

unchanged

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low

none

high

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/netplex/json-smart-v1/issues/10
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

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high

low

none

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low

none

high

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none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://github.com/netplex/json-smart-v1/issues/10
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/netplex/json-smart-v1/pull/11
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

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none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://github.com/netplex/json-smart-v1/pull/11
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/netplex/json-smart-v2/issues/67
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://github.com/netplex/json-smart-v2/issues/67
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/netplex/json-smart-v2/pull/68
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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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://github.com/netplex/json-smart-v2/pull/68
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2023/03/msg00030.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

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://lists.debian.org/debian-lts-announce/2023/03/msg00030.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-31684
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:N/A:H Found at https://security.netapp.com/advisory/ntap-20240621-0006
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://security.netapp.com/advisory/ntap-20240621-0006/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.oracle.com/security-alerts/cpujan2022.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

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://www.oracle.com/security-alerts/cpujan2022.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.oracle.com/security-alerts/cpujul2022.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

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-06-26T20:29:15Z/ Found at https://www.oracle.com/security-alerts/cpujul2022.html
Exploit Prediction Scoring System (EPSS)
Percentile 0.19454
EPSS Score 0.00062
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:06:13.137074+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/02/GHSA-fg2v-w576-w4v3/GHSA-fg2v-w576-w4v3.json 38.0.0