VULNERABILITY INTELLIGENCE

CVE-2021-4406

CVSS score9.1 CRITICAL
EPSS probability0.96%
CISA KEVNot currently listed
Published2023-07-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Description

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.

Weakness classification

  • csirt@divd.nl: CWE-77
  • nvd@nist.gov: CWE-77

Primary references