Vulnerability record · CVE-2021-30121 · published 9 July 2021

CVE-2021-30121: Kaseya vsa inclusion from untrusted sphere vulnerability

Kaseya · Vsa

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

6.5 CVSS 3.1 Medium EPSS 4.8% · top 8.3% CWE-829 · Inclusion from untrusted sphere

6.5CVSS 3.1 base score, v2 4.0

4.8%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Vsa Kaseya

References

Link	Tags
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/	PatchThird Party Advisory
https://csirt.divd.nl/CVE-2021-30121	ExploitThird Party Advisory
https://csirt.divd.nl/DIVD-2021-00011	PatchThird Party Advisory
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/	PatchThird Party Advisory
https://csirt.divd.nl/CVE-2021-30121	ExploitThird Party Advisory
https://csirt.divd.nl/DIVD-2021-00011	PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-30118Kaseya VSA unauthenticated arbitrary file upload leading to RCEKaseya VSA Unified RMM 9.5.4.2149 exposes /SystemTab/uploader.aspx, which accepts file uploads without validating the sessionId cookie, so any numeri…EPSS 60%analysed9 Jul 2021 8.8CVE-2021-30117Kaseya VSA exportFldr.asp SQL injection via fldrIdThe /InstallTab/exportFldr.asp endpoint in Kaseya VSA is vulnerable to boolean-based blind SQL injection through the fldrId parameter. The flaw is de…EPSS 72%analysed9 Jul 2021 7.5CVE-2021-30120Kaseya vsa vulnerabilityKaseya VSA before 9.5.7 allows attackers to bypass the 2FA requirement. The need to use 2FA for authentication in enforce client-side instead of serv…EPSS 5.7%9 Jul 2021 7.5CVE-2021-30201Kaseya vsa xml external entity (xxe) vulnerabilityThe API /vsaWS/KaseyaWS.asmx can be used to submit XML to the system. When this XML is processed (external) entities are insecurely processed and fet…EPSS 25%9 Jul 2021 6.7CVE-2019-14510Kaseya vsa incorrect default permissions vulnerabilityAn issue was discovered in Kaseya VSA RMM through 9.5.0.22. When using the default configuration, the LAN Cache feature creates a local account FSAdm…EPSS 0.53%11 Oct 2019 5.4CVE-2021-30119Kaseya VSA HelpDeskTab rcResults.asp reflected XSSKaseya VSA reflects the 'result' parameter of /HelpDeskTab/rcResults.asp and the 'FileName' parameter of /done.asp back into the response without pro…EPSS 50%analysed9 Jul 2021 9.8CVE-2026-0770Langflow validate endpoint exec_globals remote code executionLangflow mishandles the exec_globals parameter passed to its validate endpoint, allowing functionality from an untrusted control sphere to be include…KEVEPSS 64%analysed23 Jan 2026 7.8CVE-2025-32463Sudo chroot local privilege escalation via untrusted nsswitch.confSudo before 1.9.17p1 loads /etc/nsswitch.conf from a user-controlled directory when the --chroot option is used, allowing inclusion of functionality …KEVEPSS 61%analysed30 Jun 2025

Source: NIST National Vulnerability Database (record CVE-2021-30121), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.