CVE-2021-45467

Name: CVE-2021-45467
Creator: NVD / NIST
Published: 2022-12-26T05:15:10.867+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 70.95%

Last modified Jun 17, 2026

CVE-2021-45467 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 70.95% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

70.95%

99.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Control-Webpanel	Webpanel	< 0.9.8.1107

References

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

Timeline

Published: Dec 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45467?

How severe is CVE-2021-45467?

CVE-2021-45467 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 70.95% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45467?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45467?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST