What is CVE-2021-45466?

CVE-2021-45466 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2022-12-26.

How severe is CVE-2021-45466?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-45466 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Control-Webpanel Webpanel

CVE-2021-45466

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.

Vulnerability class: Broken Access Control

Published 2022-12-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.553 (99.0th percentile), scored 2026-10-29.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.553 · newest: 0.553 · change: 0.000

Affected products

Control-Webpanel Webpanel

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

References

control-webpanel.com/changelog (Release Notes, Vendor Advisory)
octagon.net/blog/2022/01/22/cve-2021-45467-cwp-centos-web-panel-preauth-rce/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-45466?: CVE-2021-45466 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2022-12-26.
How severe is CVE-2021-45466?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-45466 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.