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NVD / CVE Program· CNA redhat

CVE-2021-20289: A flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final.

MediumCVSS 5.3 · v3.1—No exploit Fix available

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: 1.4% (FIRST EPSS); higher than 72.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: org.jboss.resteasy:resteasy-core (Maven) 3.16.0, 4.5.10, 4.6.1; 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.jboss.resteasy:resteasy-core (Maven) 3.16.0, 4.5.10, 4.6.1; 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 RESTEasy in all versions of RESTEasy up to 4.6.0.Final. The endpoint class and method names are returned as part of the exception response when RESTEasy cannot convert one of the request URI path or query values to the matching JAX-RS resource method's parameter value. The highest threat from this vulnerability is to data confidentiality.

Published
Mar 26, 2021
Updated
Jun 16, 2026
EPSS
1.4% · 72th 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 · 1.4%

Get told when this record changes

  • 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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Follow CVE-2021-20289

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  • 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
redhatresteasy
netapponcommand insight
quarkusquarkus
oraclecommunications cloud native core console

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 resteasy

    • resteasy 3.11.5.Final, resteasy 3.15.2.Final, resteasy 4.5.10.Final, resteasy 4.6.1.Final, resteasy 4.6.2.Finalaffected
Affected versions · NVD (4)

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

  • netapp oncommand insightall versions
  • oracle communications cloud native core console1.9.0
  • quarkus quarkusbefore 1.13.4
  • redhat resteasyup to 4.6.0 inclusive

Package-level exposure

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

EcosystemPackageAffected rangeFix
Mavenorg.jboss.resteasy:resteasy-corefrom 3.0.0 · before 3.16.03.16.0
Mavenorg.jboss.resteasy:resteasy-corefrom 4.0.0 · before 4.5.104.5.10
Mavenorg.jboss.resteasy:resteasy-corefrom 4.6.0 · before 4.6.14.6.1
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-2016-9606JBoss RESTEasy before version 3.1.2 could be forced into parsing a request with YamlProvider, resulting in unmarshalling of potentially…
    34Monitor
  • CVE-2018-1051It was found that the fix for CVE-2016-9606 in versions 3.0.22 and 3.1.2 was incomplete and Yaml unmarshalling in Resteasy is still…
    32Monitor
  • CVE-2016-6346RESTEasy enables GZIPInterceptor, which allows remote attackers to cause a denial of service via unspecified vectors.
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-1695May 19, 2020 · A flaw was found in all resteasy 3.x.x versions prior to 3.12.0.Final and all resteasy 4.x.x versions prior to 4.6.0.Final, where an…
    31Monitor
  • ← EarlierCVE-2020-25633Sep 18, 2020 · A flaw was found in RESTEasy client in all versions of RESTEasy up to 4.5.6.Final.
    21Monitor
  • Later →CVE-2020-25724May 26, 2021 · A flaw was found in RESTEasy, where an incorrect response to an HTTP request is provided.
    17Monitor

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.jboss.resteasy:resteasy-core3.16.0Package registry (OSV)
Maven:org.jboss.resteasy:resteasy-core4.5.10Package registry (OSV)
Maven:org.jboss.resteasy:resteasy-core4.6.1Package registry (OSV)
red hat:eap7-resteasy0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-resteasy-atom-provider0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-resteasy-cdi0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-resteasy-client0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-resteasy-crypto0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-resteasy-jackson-provider0:3.15.2-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-undertow0:2.2.12-2.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly0:7.4.2-2.GA_redhat_00002.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk110:7.4.2-2.GA_redhat_00002.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-java-jdk80:7.4.2-2.GA_redhat_00002.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-javadocs0:7.4.2-2.GA_redhat_00002.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7Package registry (OSV)
red hat:eap7-wildfly-modules0:7.4.2-2.GA_redhat_00002.1.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.

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-209 · Generation of Error Message Containing Sensitive Information

CVSS vector

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

—

References

Show all references (1 more)

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

All records