Kaseya VSA < 9.5.7a Multiple Vulnerabilities

critical Nessus Plugin ID 151494


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The Kaseya VSA instance installed on the remote host is affected by multiple vulnerabilities


The version of Kaseya VSA installed on the remote host is affected by multiple vulnerabilities as referenced in the vendor advisory:

- Credentials leak and business logic flaw. (CVE-2021-30116)

- Cross-Site Scripting vulnerability (XSS). (CVE-2021-30119)

- 2FA Authentication bypass. (CVE-2021-30120)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Update to Kaseya VSA version 9.5.7a or later.

See Also



Plugin Details

Severity: Critical

ID: 151494

File Name: kaseya_9_5_7_2994.nasl

Version: 1.3

Type: combined

Family: Misc.

Published: 7/12/2021

Updated: 7/13/2021

Dependencies: kaseya_agent_win_installed.nbin, kaseya_vsa_detect.nbin

Risk Information

CVSS Score Source: CVE-2021-30116


Risk Factor: Critical

Score: 9.7


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:kaseya:virtual_system_administrator, cpe:/a:kaseya:vsa

Required KB Items: installed_sw/Kaseya Agent, installed_sw/Kaseya Virtual System Administrator

Exploit Ease: No known exploits are available

Patch Publication Date: 7/11/2021

Vulnerability Publication Date: 7/9/2021

Reference Information

CVE: CVE-2021-30116, CVE-2021-30119, CVE-2021-30120