CVE-2023-42121: Control Web Panel Missing Authentication Remote Code Execution Vulnerability

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-42121 is a critical-severity flaw (CVSS 9.8) affecting webpanel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Control Web Panel Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Control Web Panel. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of authentication within the web interface. The issue results from the lack of authentication prior to allowing access to functionality. An a

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-306
Published	2024-05-03
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: control-webpanel

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-05-03 03:15 UTCPublished CVE record published
2026-06-17 06:23 UTCUpdated Record last modified

control-webpanel webpanel DOWNGRADE

Affected: 0.9.8.1152

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.8.1152

1. Check installed version

apt-cache policy webpanel || rpm -q webpanel || webpanel --version

2. No fixed release: DOWNGRADE to a release before 0.9.8.1152 (Debian / Ubuntu)

apt-cache madison webpanel sudo apt install webpanel=<VERSION_BEFORE_0.9.8.1152> sudo apt-mark hold webpanel

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list webpanel sudo dnf downgrade webpanel-<VERSION_BEFORE_0.9.8.1152> sudo dnf versionlock add webpanel

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-42121?

webpanel: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-42121 being exploited?

CVE-2023-42121 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-42121 affect?

CVE-2023-42121 affects webpanel. Severity is critical (CVSS 9.8). Control Web Panel Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Control Web Panel. Authentication is not required to exploit thi

How urgent is CVE-2023-42121?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-48703 CRITICAL 9.0 EXPLOITED UPGRADE CWP Control Web Panel OS Command Injection Vulnerability
CVE-2023-42123 HIGH 8.8 DOWNGRADE Control Web Panel mysql_manager Command Injection Remote Code Execution Vulnerability
CVE-2023-42122 HIGH 7.8 DOWNGRADE Control Web Panel wloggui Command Injection Local Privilege Escalation Vulnerability
CVE-2023-42120 HIGH 8.8 DOWNGRADE Control Web Panel dns_zone_editor Command Injection Remote Code Execution Vulnerability

References

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