Is CVE-2021-45466 in the CISA KEV catalog?

No. CVE-2021-45466 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45466?

CVE-2021-45466 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-45466?

CVE-2021-45466 has an EPSS score of 55.34% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45466?

Upgrade webpanel to 0.9.8.1107 or later.

CVE & CISA-KEV Catalog

CVE-2021-45466

CRITICALEPSS 99th pctl

9.8

CVSS v3

NVD

Description

In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, attackers can make a crafted request to api/?api=add_server&DHCP= to add an authorized_keys text file in the /resources/ folder.

CWE-863Incorrect Authorization

How to fix

Remediation Available

webpanelNVD

Affected:< 0.9.8.1107Fixed in:0.9.8.1107CVE-2021-45466derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

55.34%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Exploit1

octagon.net

Vendor Advisory1

control-webpanel.com

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-22518	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-38035	Critical	9.8	100%	KEV + Ransom	-
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2024-38856	Critical	9.8	99%	KEV	Fix
CVE-2025-29927	Critical	9.1	99%	-	Fix
CVE-2020-36289	Medium	5.3	99%	-	Fix

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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 2025-04-14.