CVE-2021-44164: Chinasea Qb Smart Service Robot

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.

Affected products

• Chinasea Qb Smart Service Robot: affected versions not specified

Published 2021-12-20. Last modified 2026-06-17.