CVE-2024-53376 Overview
CVE-2024-53376 is a command injection vulnerability in CyberPanel versions before 2.3.8. The flaw resides in the websites/submitWebsiteCreation URI, which fails to sanitize the phpSelection parameter. Authenticated remote users can inject shell metacharacters that are passed to an underlying operating system command. Successful exploitation results in arbitrary command execution on the host running CyberPanel. The vulnerability is classified under [CWE-78] (Improper Neutralization of Special Elements used in an OS Command).
Critical Impact
An authenticated attacker with website creation privileges can execute arbitrary operating system commands on the CyberPanel server, leading to full host compromise.
Affected Products
- CyberPanel versions prior to 2.3.8
- Hosting environments exposing the CyberPanel administrative interface
- Servers where CyberPanel manages web hosting workloads
Discovery Timeline
- 2024-12-16 - CVE-2024-53376 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-53376
Vulnerability Analysis
CyberPanel exposes a website creation workflow at the websites/submitWebsiteCreation endpoint. The endpoint accepts a phpSelection parameter used to indicate which PHP version should be associated with the new site. The value of phpSelection is concatenated into a shell command executed on the underlying server without proper input sanitization or argument escaping.
Because the parameter reaches an OS command interpreter unfiltered, an attacker can supply shell metacharacters such as ;, |, backticks, or $() to break out of the intended command context. The injected payload runs with the privileges of the CyberPanel service account, which typically has broad administrative rights over the hosting environment. The vulnerability has an EPSS score in the 95th percentile, indicating elevated exploit probability relative to other CVEs.
Root Cause
The root cause is missing input validation and unsafe command construction in the website creation handler. The application trusts a user-supplied form field and passes it directly to a system shell rather than using parameterized execution or an allowlist of valid PHP versions. This pattern maps directly to [CWE-78].
Attack Vector
Exploitation requires network access to the CyberPanel web interface and valid authenticated credentials with permission to submit website creation requests. The attacker sends a crafted POST request to websites/submitWebsiteCreation with shell metacharacters embedded in the phpSelection field. Public proof-of-concept material is available in the ThottySploity CVE-2024-53376 repository and the accompanying technical write-up.
See the PoC source reference for the exact request structure used during exploitation.
Detection Methods for CVE-2024-53376
Indicators of Compromise
- POST requests to websites/submitWebsiteCreation containing shell metacharacters such as ;, |, &&, backticks, or $() within the phpSelection parameter.
- Unexpected child processes spawned by the CyberPanel Python or Gunicorn workers, particularly sh, bash, curl, wget, or nc.
- New cron jobs, SSH keys, or user accounts created shortly after website creation activity.
- Outbound network connections from the CyberPanel host to attacker-controlled infrastructure following administrative HTTP requests.
Detection Strategies
- Inspect CyberPanel access logs for submitWebsiteCreation requests and decode any URL-encoded metacharacters in POST bodies.
- Correlate authenticated web requests with process-execution telemetry to identify shells launched by the web application user.
- Deploy web application firewall rules that reject phpSelection values not matching an expected PHP version pattern such as ^php\d\.\d$.
Monitoring Recommendations
- Enable process auditing (auditd or equivalent) on the CyberPanel host to record command-line arguments for shell invocations.
- Alert on any process tree where the CyberPanel service parent spawns interpreters or network utilities.
- Ship application and system logs to a centralized analytics platform to retain forensic evidence for post-incident review.
How to Mitigate CVE-2024-53376
Immediate Actions Required
- Upgrade CyberPanel to version 2.3.8 or later on all managed hosts.
- Rotate credentials for every CyberPanel user account, particularly those with website creation privileges.
- Restrict administrative interface access to trusted management networks or through a VPN.
- Audit hosts for signs of compromise, including new users, scheduled tasks, and modified web content.
Patch Information
CyberPanel resolved the issue in version 2.3.8 by sanitizing the phpSelection parameter before it reaches the command execution path. Administrators should apply the vendor update following the official CyberPanel upgrade procedure and validate the installed version after patching.
Workarounds
- Temporarily disable website creation for non-administrator roles until patching is complete.
- Place the CyberPanel management interface behind an authenticated reverse proxy that filters shell metacharacters in POST bodies.
- Apply a WAF signature that blocks phpSelection values containing characters outside a strict allowlist.
# Verify installed CyberPanel version and upgrade
cat /usr/local/CyberCP/version.txt
sh <(curl https://cyberpanel.net/install.sh || wget -O - https://cyberpanel.net/install.sh)
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
