CVE-2021-30121

Public Exploit
(Semi-)Authenticated local file inclusion in Kaseya VSA < v9.5.6

Description

Semi-authenticated local file inclusion The contents of arbitrary files can be returned by the webserver Example request: `https://x.x.x.x/KLC/js/Kaseya.SB.JS/js.aspx?path=C:\Kaseya\WebPages\dl.asp` A valid sessionId is required but can be easily obtained via CVE-2021-30118

Remediation

Solution:

  • Upgrade to a version above 9.5.6

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
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-2021-30121 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-30121?
CVE-2021-30121 has been scored as a medium severity vulnerability.
How to fix CVE-2021-30121?
To fix CVE-2021-30121: Upgrade to a version above 9.5.6
Is CVE-2021-30121 being actively exploited in the wild?
It is possible that CVE-2021-30121 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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