CVE-2022-21145 Cross-site scripting in lansweeper

Critical 9.1 Published 14 Apr 2022 Updated 15 Apr 2025

Attackers can inject arbitrary JavaScript via stored XSS in Lansweeper, potentially leading to code execution or account takeover.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-21145?

CVE-2022-21145 is a critical cross-site scripting vulnerability in lansweeper, published on 14 Apr 2022. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

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.

Weakness: CWE-79, CWE-80

Which versions are affected by CVE-2022-21145?

It affects 1 product.

Products include Lansweeper Lansweeper.

How do I fix CVE-2022-21145?

No fix has been published for CVE-2022-21145 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2022-21145 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-21145 exists.

Sources

Also known as GHSA-c8r6-vf82-fj44.