What is CVE-2020-13972?

CVE-2020-13972 is a medium-severity vulnerability in Enghouse Web Chat, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-09-03.

How severe is CVE-2020-13972?

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

Is CVE-2020-13972 known to be exploited?

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

XSS in Enghouse Web Chat

CVE-2020-13972

Enghouse Web Chat 6.2.284.34 allows XSS. When one enters their own domain name in the WebServiceLocation parameter, the response from the POST request is displayed, and any JavaScript returned from the external server is executed in the browser. This is related to CVE-2019-16951.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-09-03 · 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: 0.007 (50.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Enghouse Web Chat — versions 6.2.284.34

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

404notf0und/CVE-Flow

References

burninatorsec.blogspot.com/2020/09/cve-2020-13972-xss-via-ssrf-in.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13972?: CVE-2020-13972 is a medium-severity vulnerability in Enghouse Web Chat, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-09-03.
How severe is CVE-2020-13972?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-13972 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.