SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-3654

A vulnerability was found in openstack-nova's console proxy, noVNC.

MEDIUM 6.1EPSS 26.8%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 26.8%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

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.

CVSS 3.1
6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
26.79% probability · 98th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-601
Affected
openstack/nova · redhat/openstack platform
Source
secalert@redhat.com
EPSS trend
0%15%30%3 November 2026: 26.79%3 November 20263 November 2026

EPSS 26.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.