CVE-2021-3642

20

FAUCET Score

CVE-2021-3642 is a timing attack vulnerability in Wildfly Elytron versions prior to 1.10.14.Final, 1.15.5.Final, and 1.16.1.Final, affecting products like Quarkus and Red Hat. Rated Medium (CVSS 5.3), it has a network attack vector and high confidentiality impact, but requires high attack complexity and low privileges. There is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low current threat.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 1.10.14CPE matchmatch criteria	cpe:2.3:a:redhat:wildfly_elytron::::::::
		>= 1.11.0, < 1.15.5CPE matchmatch criteria	cpe:2.3:a:redhat:wildfly_elytron::::::::
		>= 1.16.0, < 1.16.1CPE matchmatch criteria	cpe:2.3:a:redhat:wildfly_elytron::::::::
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:redhat:build_of_quarkus:-:::::::*
		12.0CPE matchmatch criteria	cpe:2.3:a:redhat:codeready_studio:12.0:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.6

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.85%

Probability of exploitation in next 30 days

EPSS Percentile

54.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0085 is in the 43rd percentile among its peer group of 1,425 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (55)

mavenpatch availablevia ghsa

Product: org.wildfly.security:wildfly-elytronFixed in: 1.10.14

mavenpatch availablevia ghsa

Product: org.wildfly.security:wildfly-elytronFixed in: 1.15.5

mavenpatch availablevia ghsa

Product: org.wildfly.security:wildfly-elytronFixed in: 1.16.1

redhatpatch availablevia redhat_api

Product: Red Hat Data Grid 8.3.0Fixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat EAP-XP 2 via EAP 7.3.x baseFixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat Fuse 7.11Fixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat Integration Camel Quarkus 2

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-jsoup-0:1.14.2-1.redhat_00002.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-resteasy-0:3.11.5-1.Final_redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-undertow-0:2.0.41-1.SP1_redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-wildfly-0:7.3.10-2.GA_redhat_00003.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-wildfly-elytron-0:1.10.15-1.Final_redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-wss4j-0:2.2.7-1.redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6Fixed in: eap7-xml-security-0:2.1.7-1.redhat_00001.1.el6eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-jsoup-0:1.14.2-1.redhat_00002.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-resteasy-0:3.11.5-1.Final_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-undertow-0:2.0.41-1.SP1_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-wildfly-0:7.3.10-2.GA_redhat_00003.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-wildfly-elytron-0:1.10.15-1.Final_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-wss4j-0:2.2.7-1.redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7Fixed in: eap7-xml-security-0:2.1.7-1.redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-jsoup-0:1.14.2-1.redhat_00002.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-resteasy-0:3.11.5-1.Final_redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-undertow-0:2.0.41-1.SP1_redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: EAP 7.3.10 GAFixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat build of Quarkus 2.2.3Fixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7Fixed in: eap7-wildfly-elytron-0:1.15.5-1.Final_redhat_00001.1.el7eap

redhatpatch availablevia redhat_api

Product: Red Hat Single Sign-On 7.4.10Fixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat Support for Spring Boot 2.5.10Fixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: RHPAM 7.13.0 asyncFixed in: wildfly-elytron

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-wildfly-0:7.3.10-2.GA_redhat_00003.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-wildfly-elytron-0:1.10.15-1.Final_redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-wss4j-0:2.2.7-1.redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8Fixed in: eap7-xml-security-0:2.1.7-1.redhat_00001.1.el8eap

redhatpatch availablevia redhat_api

Product: Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8Fixed in: eap7-wildfly-elytron-0:1.15.5-1.Final_redhat_00001.1.el8eap

redhatvendor investigatingvia nvd_reference

redhatvendor investigatingvia redhat_api

Product: Red Hat Integration Camel K 1Fixed in: wildfly-elytron

redhatno patchvia redhat_api

Product: Red Hat build of QuarkusFixed in: wildfly-elytron

redhatno patchvia redhat_api

Product: Red Hat Integration Camel Quarkus 1Fixed in: wildfly-elytron

Vendor Advisories (2)

mavenGHSA-5499-qjvh-6j7wmedium

Observable Discrepancy in Wildfly Elytron

redhatCVE-2021-3642Moderate

wildfly-elytron: possible timing attack in ScramServer

References

bugzilla.redhat.com / show_bug.cgi

Issue TrackingVendor Advisory