NVD / CVE Program· CNA redhat

CVE-2021-20318: The HornetQ component of Artemis in EAP 7 was not updated with the fix for CVE-2016-4978.

Noroxi assessment

Priority: Monitor (action score 29/100)

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: 1.7% (FIRST EPSS); higher than 78.1% of all records.
Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: eap7-hornetq (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap; eap7-hornetq-commons (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap; eap7-hornetq-core-client (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap.

Low priority for now. Upgrade to eap7-hornetq (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap; eap7-hornetq-commons (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap; eap7-hornetq-core-client (Red Hat:jboss_enterprise_application_platform:7.4::el7) 0:2.4.8-1.Final_redhat_00001.1.el7eap 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

The HornetQ component of Artemis in EAP 7 was not updated with the fix for CVE-2016-4978. A remote attacker could use this flaw to execute arbitrary code with the permissions of the application using a JMS ObjectMessage.

HighCVSS 7.2 · v3.1—No exploit Fix available

Published: Dec 23, 2021
Updated: Jun 16, 2026
EPSS: 1.7% · 78th percentile
CWE: CWE-502

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 1.7%

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

If any of these changes, we'll tell you in the daily email digest.

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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.

ProductVersion

Vendor	Product	CPE
redhat	jboss enterprise application platform	cpe:2.3:a:redhat:jboss_enterprise_application_platform

Affected versions

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

redhat jboss enterprise application platform7.3.9
redhat jboss enterprise application platform7.4.0

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 Artemis in EAP 7
- 7.3.9.GA, 7.4.0.GAaffected

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Red Hat:jboss_enterprise_application_platform:7.4::el7	eap7-hornetq	before 0:2.4.8-1.Final_redhat_00001.1.el7eap	0:2.4.8-1.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform:7.4::el7	eap7-hornetq-commons	before 0:2.4.8-1.Final_redhat_00001.1.el7eap	0:2.4.8-1.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform:7.4::el7	eap7-hornetq-core-client	before 0:2.4.8-1.Final_redhat_00001.1.el7eap	0:2.4.8-1.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform:7.4::el7	eap7-hornetq-jms-client	before 0:2.4.8-1.Final_redhat_00001.1.el7eap	0:2.4.8-1.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform:7.4::el7	eap7-undertow	before 0:2.2.13-1.SP2_redhat_00001.1.el7eap	0:2.2.13-1.SP2_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform:7.4::el8	eap7-hornetq	before 0:2.4.8-1.Final_redhat_00001.1.el8eap	0:2.4.8-1.Final_redhat_00001.1.el8eap
Red Hat:jboss_enterprise_application_platform:7.4::el8	eap7-hornetq-commons	before 0:2.4.8-1.Final_redhat_00001.1.el8eap	0:2.4.8-1.Final_redhat_00001.1.el8eap
Red Hat:jboss_enterprise_application_platform:7.4::el8	eap7-hornetq-core-client	before 0:2.4.8-1.Final_redhat_00001.1.el8eap	0:2.4.8-1.Final_redhat_00001.1.el8eap
Red Hat:jboss_enterprise_application_platform:7.4::el8	eap7-hornetq-jms-client	before 0:2.4.8-1.Final_redhat_00001.1.el8eap	0:2.4.8-1.Final_redhat_00001.1.el8eap
Red Hat:jboss_enterprise_application_platform:7.4::el8	eap7-undertow	before 0:2.2.13-1.SP2_redhat_00001.1.el8eap	0:2.2.13-1.SP2_redhat_00001.1.el8eap

Same product

redhat: all records

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76This week

Published before and after this one in the same product

← EarlierCVE-2020-14299Oct 16, 2020 · A flaw was found in JBoss EAP, where the authentication configuration is set-up using a legacy SecurityRealm, to delegate to a legacy…
26Monitor
← EarlierCVE-2020-14317Jun 2, 2021 · It was found that the issue for security flaw CVE-2019-3805 appeared again in a further version of JBoss Enterprise Application Platform…
22Monitor
Later →CVE-2022-0866May 10, 2022 · This is a concurrency issue that can result in the wrong caller principal being returned from the session context of an EJB that is…
21Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
red hat:eap7-hornetq	0:2.4.8-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7	Package registry (OSV)
red hat:eap7-hornetq-commons	0:2.4.8-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7	Package registry (OSV)
red hat:eap7-hornetq-core-client	0:2.4.8-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7	Package registry (OSV)
red hat:eap7-hornetq-jms-client	0:2.4.8-1.Final_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7	Package registry (OSV)
red hat:eap7-undertow	0:2.2.13-1.SP2_redhat_00001.1.el7eap · Red Hat:jboss_enterprise_application_platform:7.4::el7	Package 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).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
Administrator privileges are required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: High
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

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

nvd-primary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python

1payload = sock.recv(65536)
2job = pickle.loads(payload)

Fixed

python

1payload = sock.recv(65536)
2if not hmac.compare_digest(sign(payload), header_sig):
3    raise PermissionError("invalid signature")
4job = JobSchema.validate(json.loads(payload))

Attack context

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

Attack patterns (CAPEC)

Object InjectionCAPEC-586likelihood: Medium · High

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

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

References

bugzilla.redhat.com/show_bug.cgi?id=2010559

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

All records