Kaseya · Kaseya Vsa · CVE-2021-30119
**Name of the Vulnerable Software and Affected Versions**
Kaseya VSA versions prior to 9.5.7
**Description**
The issue is related to an authenticated reflective Cross Site Scripting (XSS) attack. Specifically, the `result` parameter of the `/HelpDeskTab/rcResults.asp` endpoint and the `FileName` parameter of the `/done.asp` endpoint are insecurely returned in the requested web page, allowing for XSS attacks. For example, an attacker could use the endpoint `/HelpDeskTab/rcResults.asp` with a malicious `result` parameter, such as `<script>alert(document.cookie)</script>`, to execute a Cross Site Scripting attack. Similarly, the `/done.asp` endpoint is vulnerable with a crafted `FileName` parameter.
**Recommendations**
For versions prior to 9.5.7, update to version 9.5.7 or later to resolve the issue.
As a temporary workaround, consider restricting access to the `/HelpDeskTab/rcResults.asp` and `/done.asp` endpoints until a patch is applied.
Avoid using the `result` parameter in the `/HelpDeskTab/rcResults.asp` endpoint and the `FileName` parameter in the `/done.asp` endpoint until the issue is resolved.