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Public proof of conceptFix available

CVE-2021-45467

A public proof of concept exists; no exploitation attested.

  • Published2022-12-26
  • Fixed in0.9.8.1107
  • WeaknessCWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2022-12-2605:15CVE publishedNVD

Versions per branch

NVD
Control-webpanel webpanel
BranchAffectedFixed in
0.9< 0.9.8.11070.9.8.1107

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Control-webpanel webpanel to 0.9.8.1107

Advisories and patches

Detection

read 2026-11-04 22:56 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-12-26
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-4xcw-rcp3-wq4p

Frequently asked questions

What is 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.

Is CVE-2021-45467 actively exploited?

Active exploitation of CVE-2021-45467 has not been confirmed. Its EPSS score was 70.7% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45467?

CVE-2021-45467 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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