ZKBio Time - Path Traversal (CVE-2023-38950)

CVE-2023-38950 is a path traversal vulnerability in the iclock API of ZKTeco BioTime v8.5.5 which allows unauthenticated attackers to read arbitrary files on the server by sending specially crafted requests. This security flaw could be exploited to access sensitive information, configuration files, or credentials, potentially leading to further attacks on the affected system.

CrowdSec has been tracking this vulnerability and its exploits since 25th of June 2025.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2023-38950 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. CrowdSec data also reveals a clear uptick in attacks involving CVE-2023-38950 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers exploit the /iclock/file endpoint by supplying directory traversal sequences in the url parameter to access arbitrary files on the server.