CVE-2021-30121

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

• CWE-829

• https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/Patch, Third Party Advisory
• https://csirt.divd.nl/CVE-2021-30121Exploit, Third Party Advisory
• https://csirt.divd.nl/DIVD-2021-00011Patch, Third Party Advisory
• https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/Patch, Third Party Advisory
• https://csirt.divd.nl/CVE-2021-30121Exploit, Third Party Advisory
• https://csirt.divd.nl/DIVD-2021-00011Patch, Third Party Advisory

Published

Jul 9, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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