CVE-2021-44163: Chain Sea Information Integration Co., Ltd ai chatbot system - Reflected XSS

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-20 · updated 2026-06-17
Weakness: CWE-79

Description

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: all versions

References

https://www.twcert.org.tw/tw/cp-132-5399-03b81-1.html
https://www.twcert.org.tw/tw/cp-132-5399-03b81-1.html

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