What is CVE-2020-23055?

CVE-2020-23055 is a medium-severity vulnerability in Lancom-Systems Lcos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-10-22.

How severe is CVE-2020-23055?

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

XSS in Lancom-Systems Lcos

CVE-2020-23055

ANCOM WLAN Controller (Wireless Series & Hotspot) WLC-1000 & WLC-4006 was discovered to contain multiple cross-site scripting (XSS) vulnerabilities in the /authen/start/ module via the userid and password parameters.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-10-22 · 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: 0.006 (45.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Lancom-Systems Lcos — versions 10.12, 10.20, 10.32
Lancom-Systems Wlc-1000
Lancom-Systems Wlc-4006

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.vulnerability-lab.com/get_content.php (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-23055?: CVE-2020-23055 is a medium-severity vulnerability in Lancom-Systems Lcos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-10-22.
How severe is CVE-2020-23055?: Medium severity. CVSS v3 base score is 5.4 out of 10.