CVE-2021-42083

An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.3 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://csirt.divd.nl/CVE-2021-42083	Third Party Advisory
https://csirt.divd.nl/DIVD-2021-00020/
https://www.osnexus.com/products/software-defined-storage	Product
https://www.wbsec.nl/osnexus	Third Party Advisory
https://csirt.divd.nl/CVE-2021-42083	Third Party Advisory
https://www.divd.nl/DIVD-2021-00020
https://www.osnexus.com/products/software-defined-storage	Product
https://www.wbsec.nl/osnexus	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:linux:linux_kernel:-:::::::*
	cpe:2.3:o:microsoft:windows:-:::::::*

History

22 Sep 2025, 07:15

Type	Values Removed	Values Added
Summary	~~(en) An authenticated attacker is able to create alerts that trigger a stored XSS attack.~~	(en) An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id \| tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id \| tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

Information

Published : 2023-07-10 16:15

Updated : 2025-09-22 07:15

NVD link : CVE-2021-42083

Mitre link : CVE-2021-42083

CVE.ORG link : CVE-2021-42083

JSON object : View

Products Affected

microsoft

windows

linux

linux_kernel

osnexus

quantastor

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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