{
  "cveId": "CVE-2021-40906",
  "url": "https://patchblox.com/security/cve/CVE-2021-40906",
  "summary": "CVE-2021-40906 is fixed in 6 products on 1 platform, first by check-mk-agent 1.2.8p16-1ubuntu0.2, released March 25, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "check-mk-agent: CheckMK Raw Edition software (versions 1.5.0 to 1.6.0) does not sanitise the input of a web service parameter that is...",
  "description": "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.",
  "published": "2022-03-25T16:15:00Z",
  "severity": "Medium",
  "epss": 0.00998,
  "epssPercentile": 0.62953,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "check-mk-agent",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-agent 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-agent-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "check-mk-agent-logwatch",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-agent-logwatch 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-agent-logwatch-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "check-mk-config-icinga",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-config-icinga 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-config-icinga-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "check-mk-livestatus",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-livestatus 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-livestatus-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "check-mk-multisite",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-multisite 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-multisite-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    },
    {
      "platform": "linux",
      "product": "check-mk-server",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.8p16-1ubuntu0.2",
      "fix": "check-mk-server 1.2.8p16-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-check-mk-server-1.2.8p16-1ubuntu0.2",
      "released": "2022-03-25T16:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}