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NVD / CVE Program· CNA redhat

CVE-2021-3642: A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer ma

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.84% (FIRST EPSS); higher than 58.1% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: org.wildfly.security:wildfly-elytron (Maven) 1.15.5, 1.16.1, 1.10.14; eap7-apache-cxf (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:3.3.12-1.redhat_00001.1.el6eap; eap7-apache-cxf-rt (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:3.3.12-1.redhat_00001.1.el6eap.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to org.wildfly.security:wildfly-elytron (Maven) 1.15.5, 1.16.1, 1.10.14; eap7-apache-cxf (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:3.3.12-1.redhat_00001.1.el6eap; eap7-apache-cxf-rt (Red Hat:jboss_enterprise_application_platform:7.3::el6) 0:3.3.12-1.redhat_00001.1.el6eap or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Aug 5, 2021
Updated
Jun 17, 2026
EPSS
0.8% · 58th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatwildfly elytron
redhatbuild of quarkus
redhatcodeready studio
redhatdata grid
redhatdescision manager
redhatintegration camel k
redhatintegration camel quarkus
redhatjboss enterprise application platform
redhatjboss enterprise application platform expansion pack
redhatjboss fuse
redhatopenshift application runtimes
redhatprocess automation

and 1 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • quarkus quarkusup to 2.1.4 inclusive
  • redhat build of quarkusall versions
  • redhat codeready studio12.0
  • redhat data grid8.0
  • redhat descision manager7.0
  • redhat integration camel kall versions
  • redhat integration camel quarkusall versions
  • redhat jboss enterprise application platform7.0.0
  • redhat jboss enterprise application platform expansion packall versions
  • redhat jboss fuse7.0.0
  • redhat openshift application runtimesall versions
  • redhat process automation7.0
  • redhat wildfly elytron1.11.0 and later · before 1.15.5
  • redhat wildfly elytronbefore 1.10.14
  • redhat wildfly elytron1.16.0 and later · before 1.16.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a wildfly-elytron

    • Wildfly Elytron 1.10.14.Final, Wildfly Elytron 1.15.5.Final, Wildfly Elytron 1.16.1.Finalaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.wildfly.security:wildfly-elytronfrom 1.11.0 · before 1.15.51.15.5
Mavenorg.wildfly.security:wildfly-elytronfrom 1.16.0 · before 1.16.11.16.1
Mavenorg.wildfly.security:wildfly-elytronbefore 1.10.141.10.14
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-apache-cxfbefore 0:3.3.12-1.redhat_00001.1.el6eap0:3.3.12-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-apache-cxf-rtbefore 0:3.3.12-1.redhat_00001.1.el6eap0:3.3.12-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-apache-cxf-servicesbefore 0:3.3.12-1.redhat_00001.1.el6eap0:3.3.12-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-apache-cxf-toolsbefore 0:3.3.12-1.redhat_00001.1.el6eap0:3.3.12-1.redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamarbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-common-apibefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-common-implbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-common-spibefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-core-apibefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-core-implbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-deployers-commonbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-jdbcbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-ironjacamar-validatorbefore 0:1.5.3-1.Final_redhat_00001.1.el6eap0:1.5.3-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jakarta-elbefore 0:3.0.3-3.redhat_00007.1.el6eap0:3.0.3-3.redhat_00007.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-ejb-clientbefore 0:4.0.43-1.Final_redhat_00001.1.el6eap0:4.0.43-1.Final_redhat_00001.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migrationbefore 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migration-clibefore 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migration-corebefore 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migration-eap6.4before 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migration-eap6.4-to-eap7.3before 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap
Red Hat:jboss_enterprise_application_platform:7.3::el6eap7-jboss-server-migration-eap7.0before 0:1.7.2-10.Final_redhat_00011.1.el6eap0:1.7.2-10.Final_redhat_00011.1.el6eap

+96

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-10714A flaw was found in WildFly Elytron version 1.11.3.Final and before.
    30Monitor
  • CVE-2020-1748A flaw was found in all supported versions before wildfly-elytron-1.6.8.Final-redhat-00001, where the WildFlySecurityManager checks were byp
    30Monitor
  • CVE-2022-3143wildfly-elytron: possible timing attacks via use of unsafe comparator.
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.wildfly.security:wildfly-elytron1.10.14Package registry (OSV)
Maven:org.wildfly.security:wildfly-elytron1.15.5Package registry (OSV)
Maven:org.wildfly.security:wildfly-elytron1.16.1Package registry (OSV)
red hat:eap7-netty0:4.1.63-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-netty-all0:4.1.63-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-undertow0:2.2.9-2.SP1_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-velocity0:2.3.0-1.redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-velocity-engine-core0:2.3.0-1.redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly0:7.4.1-2.GA_redhat_00003.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-elytron0:1.15.5-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-elytron-tool0:1.15.5-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk110:7.4.1-2.GA_redhat_00003.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk80:7.4.1-2.GA_redhat_00003.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-javadocs0:7.4.1-2.GA_redhat_00003.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-modules0:7.4.1-2.GA_redhat_00003.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-203 · Observable Discrepancy

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records