Chain Sea Information Integration Co., Ltd ai chatbot system - Reflected XSS

published 2021-12-20 4y ago modified 2026-06-17 4mo ago also EUVD-2021-31013

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

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.

Is CVE-2021-44163 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Chain Sea Information Integration Co., Ltd ai chatbot system

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

twcert.org.tw /tw/cp-132-5399-03b81-1.html
third-party-advisory

Sources

CVE List CVE-2021-44163
NVD CVE-2021-44163

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.