CVE-2021-44163: Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a re

Routine

MEDIUM 6.1MITIGATE

CVE-2021-44163 is a medium-severity flaw (CVSS 6.1) affecting qb smart service robot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-12-20
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: chinasea

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-12-20 03:15 UTCPublished CVE record published
2026-06-17 04:11 UTCUpdated Record last modified

chinasea qb smart service robot MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy qb-smart-service-robot || rpm -q qb-smart-service-robot || qb-smart-service-robot --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-44163?

qb smart service robot: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-44163 being exploited?

CVE-2021-44163 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-44163 affect?

CVE-2021-44163 affects qb smart service robot. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2021-44163?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2021-44164 CRITICAL 9.8 MITIGATE Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs,
CVE-2021-44162 HIGH 7.5 MITIGATE Chain Sea ai chatbot system’s specific file download function has path traversal vulnerability

References

← Back to latest CVEs