Is CVE-2021-4231 in the CISA KEV catalog?

No. CVE-2021-4231 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4231?

CVE-2021-4231 has a CVSS v3 base score of 3.5 (LOW).

What is the EPSS score for CVE-2021-4231?

CVE-2021-4231 has an EPSS score of 1.05% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4231?

Upgrade ansible-collection-ansible-posix on rocky 9 to 0:1.2.0-1.3.el9ost or later. Fixes are available for 114 affected products.

CVE & CISA-KEV Catalog

CVE-2021-4231

LOW

3.5

CVSS v3

NVD

Description

A vulnerability was found in Angular up to 11.0.4/11.1.0-next.2. It has been classified as problematic. Affected is the handling of comments. The manipulation leads to cross site scripting. It is possible to launch the attack remotely but it might require an authentication first. Upgrading to version 11.0.5 and 11.1.0-next.3 is able to address this issue. The name of the patch is ba8da742e3b243e8f43d4c63aa842b44e14f2b09. It is recommended to upgrade the affected component.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

ansible-collection-ansible-posixRocky

Fixed in:0:1.2.0-1.3.el9ostRHSA-2023:3623

ansible-collection-ansible-posixRed Hat / RHEL

Fixed in:0:1.2.0-1.3.el9ostRHSA-2023:3623

cephRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-baseRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-baseRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-base-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-base-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-commonRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-commonRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-common-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-common-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-debugsourceRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-debugsourceRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-exporter-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-exporter-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-fuseRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-fuseRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-fuse-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-fuse-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-immutable-object-cacheRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-immutable-object-cacheRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-immutable-object-cache-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-immutable-object-cache-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mds-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mds-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mgr-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mgr-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mibRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mibRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mon-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-mon-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-osd-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-osd-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-radosgw-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-radosgw-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-resource-agentsRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-resource-agentsRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-selinuxRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-selinuxRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-test-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

ceph-test-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephadmRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephadmRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephadm-ansibleRed Hat / RHEL

Fixed in:0:2.15.0-1.el9cpRHSA-2023:3623

cephadm-ansibleRocky

Fixed in:0:2.15.0-1.el9cpRHSA-2023:3623

cephfs-mirror-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephfs-mirror-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephfs-topRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

cephfs-topRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs-develRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs-develRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs2Red Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs2Rocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs2-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephfs2-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephsqlite-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libcephsqlite-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados-develRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados-develRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados-devel-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados-devel-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados2Rocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados2Red Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados2-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librados2-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradospp-develRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradospp-develRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradosstriper1Rocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradosstriper1Red Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradosstriper1-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

libradosstriper1-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd-develRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd-develRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd1Red Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd1Rocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd1-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librbd1-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw-develRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw-develRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw2Rocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw2Red Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw2-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

librgw2-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-ceph-argparseRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-ceph-argparseRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-ceph-commonRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-ceph-commonRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-cephfsRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-cephfsRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-cephfs-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-cephfs-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-radosRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-radosRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rados-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rados-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rbdRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rbdRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rbd-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rbd-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rgwRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rgwRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rgw-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

python3-rgw-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-fuse-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-fuse-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-mirror-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-mirror-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-nbdRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-nbdRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-nbd-debuginfoRocky

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

rbd-nbd-debuginfoRed Hat / RHEL

Fixed in:2:17.2.6-70.el9cpRHSA-2023:3623

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.05%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

Embed a live status badge for CVE-2021-4231

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-20.