No exploitation reportedFix available

CVE-2021-3654

Q: Is CVE-2021-3654 actively exploited?

Active exploitation of CVE-2021-3654 has not been confirmed. Its EPSS score was 26.8% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-3654?

CVE-2021-3654 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

No exploitation reported by the sources we read.

Published2022-03-02
Fixed in23.0.3 · 22.2.3 · 21.2.3
WeaknessCWE-601

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability was found in openstack-nova's console proxy, noVNC. By crafting a malicious URL, noVNC could be made to redirect to any desired URL.

Timeline

dates in UTC

2022-03-0223:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-3654?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-3654?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Openstack nova

Branch	Affected	Fixed in	Source
23.0	≥ 23.0.0, < 23.0.3	23.0.3	NVD · OSV
22.x	≥ 22.0.0, < 22.2.3	22.2.3	NVD · OSV
21.2	< 21.2.3	21.2.3	NVD · OSV

Redhat openstack platform

Branch	Affected	Fixed in	Source
16.1	= 16.1	no fix published	NVD
16.2	= 16.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2021-3654 Red Hat Product Security26 products fixed · 35 known affected
openstack-nova: novnc allows open redirection
openstack-nova as a component of Red Hat OpenStack Platform 10 (Newton) · openstack-nova-api as a component of Red Hat OpenStack Platform 10 (Newton) · openstack-nova-cells as a component of Red Hat OpenStack Platform 10 (Newton) · +32 more
RHSA-2022:0983 Red Hat Product Security13 products fixed
Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (openstack-nova) security update
RHSA-2022:0999 Red Hat Product Security13 products fixed
Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (openstack-nova) security update

Full record on NVD

Fix

Update Openstack nova to 23.0.3 · 22.2.3 · 21.2.3
Vendor fix Red Hat Product Security RHSA-2022:0983 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround from the vendor Red Hat Product Security RHSA-2022:0983 · 13 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
No fix planned, says the vendor Red Hat Product Security CVE-2021-3654 · 35 productsOut of support scope

Advisories and patches

bugs.launchpad.netPatch
bugs.python.orgPatch
bugzilla.redhat.comPatch
opendev.orgPatch · Vendor Advisory
opendev.orgPatch · Vendor Advisory
security.openstack.orgPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.16.1read 2026-10-23
NVDCVSS 2.04read 2026-10-23
CNAweakness (CWE)CWE-601read 2026-10-23
NVDweakness (CWE)CWE-601read 2026-10-23
FIRST EPSSEPSS score26.8 %read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2022-03-02
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-3654?

A vulnerability was found in openstack-nova's console proxy, noVNC. By crafting a malicious URL, noVNC could be made to redirect to any desired URL.

Is CVE-2021-3654 actively exploited?

Active exploitation of CVE-2021-3654 has not been confirmed. Its EPSS score was 26.8% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-3654?

CVE-2021-3654 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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