What is CVE-2021-45467?

CVE-2021-45467 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under Missing Authorization. CVSS score: 9.8/10. Published 2022-12-26.

How severe is CVE-2021-45467?

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

Is CVE-2021-45467 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-2021-45467

In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to cause /user/loader.php to register an arbitrary API key, as demonstrated by a /user/loader.php?api=1&scripts= .%00./.%00./api/account_new_create&acc=guadaapi URI. Any number of %00 instances can be used, e.g., .%00%00%00./.%00%00%00./api/account_new_create could also be used for the scripts parameter.

Vulnerability class: Broken Access Control

EPSS: 0.707 (99.4th percentile) — read the EPSS interpretation.

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.

Affected products

Control-webpanel Webpanel
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public proof-of-concept exploits

References

cve@mitre.org (Release Notes, Vendor Advisory)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-45467?: CVE-2021-45467 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under Missing Authorization. CVSS score: 9.8/10. Published 2022-12-26.
How severe is CVE-2021-45467?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-45467 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.