Observable Response Discrepancy in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows a remote attacker to gain information about valid usernames by analyzing challenge responses from the server via the REST interface.
https://sick.com/.well-known/csaf/white/2023/sca-2023-0004.pdf
https://sick.com/.well-known/csaf/white/2023/sca-2023-0004.json