What is CVE-2022-21145?

CVE-2022-21145 is a medium-severity vulnerability in Lansweeper, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.8/10. Published 2022-04-14.

How severe is CVE-2022-21145?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Is CVE-2022-21145 known to be exploited?

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

XSS in Lansweeper

CVE-2022-21145

A stored cross-site scripting vulnerability exists in the WebUserActions.aspx functionality of Lansweeper lansweeper 9.1.20.2. A specially-crafted HTTP request can lead to arbitrary Javascript code injection. An attacker can send an HTTP request to trigger this vulnerability.

Published 2022-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.778 (99.6th percentile), scored 2026-10-28.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.778 · newest: 0.778 · change: 0.000

Affected products

Lansweeper — versions 9.1.20.2

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

talosintelligence.com/vulnerability_reports/TALOS-2022-1442 (Exploit, Third Party Advisory)
www.lansweeper.com/changelog/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2022-21145?: CVE-2022-21145 is a medium-severity vulnerability in Lansweeper, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.8/10. Published 2022-04-14.
How severe is CVE-2022-21145?: Medium severity. CVSS v3 base score is 4.8 out of 10.
Is CVE-2022-21145 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.