What is CVE-2020-6171?

CVE-2020-6171 is a medium-severity vulnerability in Communilink Clink Office, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-04-07.

How severe is CVE-2020-6171?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2020-6171 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Communilink Clink Office

CVE-2020-6171

A cross-site scripting (XSS) vulnerability in the index page of the CLink Office 2.0 management console allows remote attackers to inject arbitrary web script or HTML via the lang parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.048 (91.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.048 · newest: 0.048 · change: 0.000

Affected products

Communilink Clink Office — versions 2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

www.deepcode.ca/index.php/2020/04/07/cve-2020-xss-in-clink-office-v2/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-6171?: CVE-2020-6171 is a medium-severity vulnerability in Communilink Clink Office, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-04-07.
How severe is CVE-2020-6171?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-6171 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.