CVE-2021-30119

Public Exploit
Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6

Description

Authenticated reflective XSS in HelpDeskTab/rcResults.asp The parameter result of /HelpDeskTab/rcResults.asp is insecurely returned in the requested web page and can be used to perform a Cross Site Scripting attack Example request: `https://x.x.x.x/HelpDeskTab/rcResults.asp?result=<script>alert(document.cookie)</script>` The same is true for the parameter FileName of /done.asp Eaxmple request: `https://x.x.x.x/done.asp?FileName=";</script><script>alert(1);a="&PathData=&originalName=shell.aspx&FileSize=4388&TimeElapsed=00:00:00.078`

Remediation

Solution:

  • Upgrade to a version above 9.5.6

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.11%
Third-Party Advisory divd.nl Third-Party Advisory divd.nl Third-Party Advisory divd.nl
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ third party advisory patch
https://csirt.divd.nl/DIVD-2021-00011 third party advisory patch
https://csirt.divd.nl/CVE-2021-30119 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-30119?
CVE-2021-30119 has been scored as a medium severity vulnerability.
How to fix CVE-2021-30119?
To fix CVE-2021-30119: Upgrade to a version above 9.5.6
Is CVE-2021-30119 being actively exploited in the wild?
It is possible that CVE-2021-30119 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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