Control Web Panel Missing Authentication Remote Code Execution Vulnerability

The impact of CVE-2023-42121 is severe due to the lack of authentication required for exploitation. An attacker can directly access vulnerable endpoints and execute arbitrary code, effectively gaining control of the server hosting the Control Web Panel. This could lead to data breaches, malware installation, and complete system takeover. The absence of authentication significantly lowers the barrier to entry for attackers, increasing the likelihood of exploitation. Successful exploitation could allow attackers to modify system files, install backdoors, and pivot to other systems on the network, expanding the blast radius of the attack.

Organizations running Control Web Panel, particularly those with publicly accessible instances, are at significant risk. Shared hosting environments where multiple users share a single Control Web Panel installation are especially vulnerable, as a compromise of one user's account could potentially lead to the compromise of the entire server. Legacy configurations with outdated security practices are also at increased risk.

• linux / server: Monitor Control Web Panel logs for unusual activity, particularly requests to endpoints that should require authentication. Use journalctl -u cwp to review logs for suspicious patterns. • generic web: Use curl -I <cwp_url> to check response headers for unexpected content or error messages. Examine access logs for requests from unusual IP addresses or user agents. • database (mysql): If Control Web Panel uses a MySQL database, check for unauthorized database modifications using mysql -e 'SHOW TABLES;' and mysql -e 'SHOW PROCESSLIST;' to identify suspicious queries.

1. 2024-05-03Disclosure

   disclosure

1. Reserviert2023-09-06
2. Veröffentlicht2024-05-03
3. Geändert2024-08-02
4. EPSS aktualisiert2026-04-02

The primary mitigation for CVE-2023-42121 is to immediately upgrade Control Web Panel to a patched version. Since a specific fixed version is not provided, consult the Control Web Panel vendor's website for the latest release. If upgrading is not immediately feasible, consider implementing temporary workarounds such as restricting network access to the Control Web Panel interface using a Web Application Firewall (WAF) or proxy server. Configure the WAF to block requests to potentially vulnerable endpoints. Monitor system logs for suspicious activity and unauthorized access attempts. After upgrade, confirm the vulnerability is resolved by attempting to access the vulnerable endpoint and verifying that access is denied.