CVE-2021-44164

9.8 criticalEPSS 2.1%

Critical (9.8) in chinasea qb smart service robot. 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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-12-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

chinasea:qb_smart_service_robot

References

https://www.twcert.org.tw/tw/cp-132-5400-c31d1-1.html
https://www.twcert.org.tw/tw/cp-132-5400-c31d1-1.html

Check your stack JSON