CVE-2021-40906
moderate-risk
Published 2022-03-25
CheckMK Raw Edition software (versions 1.5.0 to 1.6.0) does not sanitise the input of a web service parameter that is in an unauthenticated zone. This Reflected XSS allows an attacker to open a backdoor on the device with HTML content and interpreted by the browser (such as JavaScript or other client-side scripts) or to steal the session cookies of a user who has previously authenticated via a man in the middle. Successful exploitation requires access to the web service resource without authentication.
Do I need to act?
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0.62% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10
Medium
NETWORK
/ LOW complexity
Affected Products (20)
References (4)
Product
http://checkmk.com
Third Party Advisory
https://github.com/Edgarloyola/CVE-2021-40906
Product
http://checkmk.com
Third Party Advisory
https://github.com/Edgarloyola/CVE-2021-40906
49
/ 100
moderate-risk
Severity
23/34 · High
Exploitability
2/34 · Minimal
Exposure
24/34 · High