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Vulnerability details: VCID-7qwz-74p6-yqhs
Vulnerability ID VCID-7qwz-74p6-yqhs
Aliases CVE-2021-3642
GHSA-5499-qjvh-6j7w
Summary Observable Discrepancy in Wildfly Elytron A flaw was found in Wildfly Elytron where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality. This flaw affectes Wildfly Elytron versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-203 Observable Discrepancy
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 3.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3642.json
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
epss 0.00267 https://api.first.org/data/v1/epss?cve=CVE-2021-3642
cvssv3.1 5.3 https://bugzilla.redhat.com/show_bug.cgi?id=1981407
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=1981407
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-5499-qjvh-6j7w
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-3642
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-3642
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3642.json
https://api.first.org/data/v1/epss?cve=CVE-2021-3642
https://bugzilla.redhat.com/show_bug.cgi?id=1981407
https://nvd.nist.gov/vuln/detail/CVE-2021-3642
GHSA-5499-qjvh-6j7w https://github.com/advisories/GHSA-5499-qjvh-6j7w
RHSA-2021:3656 https://access.redhat.com/errata/RHSA-2021:3656
RHSA-2021:3658 https://access.redhat.com/errata/RHSA-2021:3658
RHSA-2021:3660 https://access.redhat.com/errata/RHSA-2021:3660
RHSA-2021:3880 https://access.redhat.com/errata/RHSA-2021:3880
RHSA-2021:4767 https://access.redhat.com/errata/RHSA-2021:4767
RHSA-2021:5149 https://access.redhat.com/errata/RHSA-2021:5149
RHSA-2021:5150 https://access.redhat.com/errata/RHSA-2021:5150
RHSA-2021:5151 https://access.redhat.com/errata/RHSA-2021:5151
RHSA-2021:5154 https://access.redhat.com/errata/RHSA-2021:5154
RHSA-2021:5170 https://access.redhat.com/errata/RHSA-2021:5170
RHSA-2022:0146 https://access.redhat.com/errata/RHSA-2022:0146
RHSA-2022:0520 https://access.redhat.com/errata/RHSA-2022:0520
RHSA-2022:1179 https://access.redhat.com/errata/RHSA-2022:1179
RHSA-2022:5532 https://access.redhat.com/errata/RHSA-2022:5532
RHSA-2022:5903 https://access.redhat.com/errata/RHSA-2022:5903
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3642.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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=1981407
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:H/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3642
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 0.50104
EPSS Score 0.00267
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:11:19.667768+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-5499-qjvh-6j7w/GHSA-5499-qjvh-6j7w.json 38.0.0