CVE-2021-44163: Chinasea Qb Smart Service Robot

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote attacker to perform JavaScript injection for XSS (reflected Cross-site scripting) attack without authentication.

Affected products

• Chinasea Qb Smart Service Robot: affected versions not specified

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