{"id":"CVE-2021-4406","aliases":["EUVD-2021-34233","GHSA-2xf9-j9jw-g7f7"],"status":"published","title":"Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others","description":"An authenticated attacker is able to create alerts that trigger a stored XSS attack.\n\nPOC\n\n\n  *  go to the alert manager\n\n\n  *  open the ITSM tab\n  *  add a webhook with the URL/service token value \n\n'\t-h\t\u0026\u0026\tid\t|\ttee\t/tmp/ttttttddddssss\t#' (whitespaces are tab characters)\n\n\n  *  click add\n\n\n  *  click apply\n\n\n  *  create a test alert\n\n\n  *  The test alert will run the command \n\n“id\t|\ttee\t/tmp/ttttttddddssss” as root.\n\n\n  *  after the test alert inspect \n\n/tmp/ttttttddddssss it'll contain the ids of the root user.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00964,"percentile":0.62153,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-77"],"published":"2023-07-10T06:29:48Z","modified":"2026-06-17T04:19:41Z","products":[{"vendor":"osnexus","product":"quantastor"}],"references":[{"url":"https://csirt.divd.nl/DIVD-2021-00020/","tags":["third-party-advisory"]},{"url":"https://www.osnexus.com/products/software-defined-storage","tags":["product","x_transferred","Product"]},{"url":"https://csirt.divd.nl/CVE-2021-4406","tags":["third-party-advisory","exploit","technical-description","x_transferred","Third Party Advisory"]},{"url":"https://www.divd.nl/DIVD-2021-00020","tags":["third-party-advisory","x_transferred"]},{"url":"https://csirt.divd.nl/cves/CVE-2021-4406/","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4406"},{"url":"https://csirt.divd.nl/DIVD-2021-00020"},{"url":"https://csirt.divd.nl/cves/CVE-2021-4406"},{"url":"https://github.com/advisories/GHSA-2xf9-j9jw-g7f7"}],"sources":{"cve":[{"id":"CVE-2021-4406","title":"Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others","description":"An authenticated attacker is able to create alerts that trigger a stored XSS attack.\n\nPOC\n\n\n  *  go to the alert manager\n\n\n  *  open the ITSM tab\n  *  add a webhook with the URL/service token value \n\n'\t-h\t\u0026\u0026\tid\t|\ttee\t/tmp/ttttttddddssss\t#' (whitespaces are tab characters)\n\n\n  *  click add\n\n\n  *  click apply\n\n\n  *  create a test alert\n\n\n  *  The test alert will run the command \n\n“id\t|\ttee\t/tmp/ttttttddddssss” as root.\n\n\n  *  after the test alert inspect \n\n/tmp/ttttttddddssss it'll contain the ids of the root user.","status":"published","published":"2023-07-10T06:29:48.698Z","modified":"2025-09-24T15:46:35.837Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-34233","description":"An authenticated attacker is able to create alerts that trigger a stored XSS attack.\n\nPOC\n\n\n  *  go to the alert manager\n\n\n  *  open the ITSM tab\n  *  add a webhook with the URL/service token value \n\n'\t-h\t\u0026\u0026\tid\t|\ttee\t/tmp/ttttttddddssss\t#' (whitespaces are tab characters)\n\n\n  *  click add\n\n\n  *  click apply\n\n\n  *  create a test alert\n\n\n  *  The test alert will run the command \n\n“id\t|\ttee\t/tmp/ttttttddddssss” as root.\n\n\n  *  after the test alert inspect \n\n/tmp/ttttttddddssss it'll contain the ids of the root user.","status":"published","published":"2023-07-10T06:29:48Z","modified":"2025-09-24T15:46:35Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:31:40.063213Z"}],"ghsa":[{"id":"GHSA-2xf9-j9jw-g7f7","title":"An administrator is able to execute commands as root via the alerts management dialog","description":"An administrator is able to execute commands as root via the alerts management dialog","status":"published","published":"2023-07-10T18:30:47Z","modified":"2025-09-24T15:32:14Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T15:03:44.74353Z"}],"nvd":[{"id":"CVE-2021-4406","description":"An authenticated attacker is able to create alerts that trigger a stored XSS attack.\n\nPOC\n\n\n  *  go to the alert manager\n\n\n  *  open the ITSM tab\n  *  add a webhook with the URL/service token value \n\n'\t-h\t\u0026\u0026\tid\t|\ttee\t/tmp/ttttttddddssss\t#' (whitespaces are tab characters)\n\n\n  *  click add\n\n\n  *  click apply\n\n\n  *  create a test alert\n\n\n  *  The test alert will run the command \n\n“id\t|\ttee\t/tmp/ttttttddddssss” as root.\n\n\n  *  after the test alert inspect \n\n/tmp/ttttttddddssss it'll contain the ids of the root user.","status":"published","published":"2023-07-10T16:15:47.747Z","modified":"2026-06-17T04:19:41.547Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}