CVE-2025-48703

CWP (Control Web Panel, also known as CentOS Web Panel) versions before 0.9.8.1205 contain an unauthenticated OS command injection flaw (CWE-78): shell metacharacters supplied in the t_total parameter of a filemanager changePerm request are passed to a shell and executed by the server. The only precondition is knowing a valid non-root username on the target, which raises attack complexity but can be trivially met through exposed or common account names. Successful exploitation yields remote code execution on the hosting server, and the scope-changed CVSS metric (S:C with C:H/I:H/A:H) indicates impact beyond the vulnerable component. Any CWP installation running a version earlier than 0.9.8.1205 is affected — typically internet-facing CentOS/RHEL/AlmaLinux servers run by small hosting providers, resellers, and administrators. The flaw is being actively exploited: CISA added it to the Known Exploited Vulnerabilities catalog on 2025-11-04, a public proof of concept is available, and EPSS assigns a 99.7% probability of exploitation within 30 days.

What to do: Upgrade to CWP 0.9.8.1205 or later using the panel's built-in update process, as required by CISA's KEV/BOD 22-01 guidance; until patched, restrict access to the CWP admin ports (2030/2031) to trusted IPs or a VPN and limit exposed usernames, since the attacker must know a valid non-root user. Review logs for filemanager changePerm requests containing metacharacters in the t_total parameter to detect exploitation attempts, and check for signs of post-exploitation such as unexpected processes, cron entries, or web shells.