How severe is CVE-2021-3536?

CVE-2021-3536 has a CVSS score of 4.8/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2021-3536?

CVE-2021-3536 affects the following packages: org.wildfly:wildfly-parent (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-3536?

Update org.wildfly:wildfly-parent to 23.0.2.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-3536 is resolved across your whole dependency graph.

How do I detect CVE-2021-3536 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.wildfly:wildfly-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2021-3536 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2021-3536 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-3536 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-3536?

CVE-2021-3536 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 45th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2021-3536?

CVE-2021-3536 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2021-3536 published, and has it been updated?

CVE-2021-3536 was published on May 20, 2021 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2021-3536 — wildfly-parent

MEDIUM

CVE-2021-3536 is a medium-severity (CVSS 4.8) Cross-site Scripting (XSS) vulnerability in org.wildfly:wildfly-parent. A fix is available for org.wildfly:wildfly-parent — see the affected versions and patch details below.

Cross-site Scripting in Wildfly

Also known asBIT-wildfly-2021-3536GHSA-v2wx-jj66-2hp7

Published

May 20, 2021

Updated

Oct 24, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs45th percentile — riskier than 45% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.wildfly:wildfly-parent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

A flaw was found in Wildfly in versions before 23.0.2.Final while creating a new role in domain mode via the admin console, it is possible to add a payload in the name field, leading to XSS. This affects Confidentiality and Integrity.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.wildfly:wildfly-parent`	all versions	23.0.2.Final`org.wildfly:wildfly-parent:23.0.2.Final`

Affected Products

9 products · 9 configurations

Application

build of quarkusredhat

all

Application

data gridredhat

1 version

8.0

Application

descision managerredhat

1 version

7.0

Application

integration camel kredhat

all

Application

integration camel quarkusredhat

all

Application

integration service registryredhat

all

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.wildfly:wildfly-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.wildfly:wildfly-parent to 23.0.2.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-3536 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatLow

This flaw does not affect Red Hat CodeReady Studio 12 because it uses the Wildfly client only. The domain mode is not used.

Product	Fixed in	Advisory
EAP 7.3.8	`wildfly`	RHSA-2021:2696
Red Hat EAP-XP 2.0.0 via EAP 7.3.x base	`wildfly`	RHSA-2021:2755
Red Hat Fuse 7.10	`wildfly`	RHSA-2021:5134
Red Hat JBoss Enterprise Application Platform	`org.jboss.hal/hal-console:3.3.7.Final-redhat-00001`	RHSA-2021:3660
Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 6	`eap7-elytron-web-0:1.6.3-1.Final_redhat_00001.1.el6eap`	RHSA-2021:2692
Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 7	`eap7-elytron-web-0:1.6.3-1.Final_redhat_00001.1.el7eap`	RHSA-2021:2693
Red Hat JBoss Enterprise Application Platform 7.3 for RHEL 8	`eap7-elytron-web-0:1.6.3-1.Final_redhat_00001.1.el8eap`	RHSA-2021:2694
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8	`eap7-wildfly-0:7.4.1-2.GA_redhat_00003.1.el8eap`	RHSA-2021:3658

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-3536 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

4.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

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

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

May 20, 2021

Last updated

Oct 24, 2026

Identifiers

CVE-2021-3536

GHSA-v2wx-jj66-2hp7

BIT-wildfly-2021-3536

References

Advisorynvd.nist.gov · CVE 2021 3536 Reportbugzilla.redhat.com · show bug.cgi

Related vulnerabilities

Also affects wildfly-parent

This CVE is medium severity; 5 of 5 other CVEs affecting wildfly-parent are rated as high or higher (top: high).

CVE-2020-27822CVE-2020-10740CVE-2015-3198CVE-2016-0793CVE-2020-25640

Same weakness: CWE-79

This CVE is medium severity; 3 of 3 other CVEs with CWE-79 are rated as high or higher (top: critical).

CVE-2026-113787CVE-2026-44267CVE-2026-96632Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2021-3536 — wildfly-parent

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2021-3536 in your dependencies?