What is CVE-2020-18664?

CVE-2020-18664 is a medium-severity vulnerability in Webport Web Port, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-06-24.

How severe is CVE-2020-18664?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Webport Web Port

CVE-2020-18664

Cross Site Scripting (XSS) vulnerability in WebPort <=1.19.1via the connection name parameter in type-conn.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% 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

Webport Web Port

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/LoRexxar/CVE_Request/blob/master/web port mul vuls before v1.19.1/we… (Exploit, Third Party Advisory)
www.seebug.org/vuldb/ssvid-97994 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-18664?: CVE-2020-18664 is a medium-severity vulnerability in Webport Web Port, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-06-24.
How severe is CVE-2020-18664?: Medium severity. CVSS v3 base score is 5.4 out of 10.