Directory Traversal Vulnerability in Cloud Commander

hello@craftedsignal.io — Sat, 29 Aug 2026 17:40:36 +0000

Cloud Commander versions prior to 19.20.2 contain a directory traversal vulnerability within the REST file-operation and markdown endpoints. The flaw exists due to insufficient validation of path normalization, allowing an unauthenticated attacker to supply crafted path traversal sequences. By exploiting this, an attacker can perform unauthorized file system operations, including reading sensitive configuration files, modifying existing files, or writing new files to locations outside of the configured root directory. This vulnerability presents a high risk for full server compromise depending on the permissions of the user account running the Cloud Commander service.

Impact

Successful exploitation allows unauthenticated remote attackers to gain unauthorized access to the filesystem. This can lead to the exfiltration of sensitive data, the injection of malicious code into system files, or the deletion of critical resources, potentially resulting in full system compromise.

Recommendation

Update all instances of Cloud Commander to version 19.20.2 or later immediately to mitigate the underlying path normalization flaw.

Cloud Commander - CraftedSignal Threat Feed

Directory Traversal Vulnerability in Cloud Commander

Impact

Recommendation