CVE-2021-40906

Published: 25 March 2022

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.

Notes

fix 1.6.0p26: https://github.com/tribe29/checkmk/commit/6b89403e47b541f96ac2b2c5953360a039a1fc71

Priority

Medium

CVSS 3 base score: 6.1

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40906
• https://checkmk.com/werk/13192
• https://github.com/Edgarloyola/CVE-2021-40906
• https://ubuntu.com/security/notices/USN-5527-1
• NVD
• Launchpad
• Debian