{"id":"CVE-2021-42083","aliases":["EUVD-2021-29069","GHSA-9c8q-55w7-h67h"],"status":"published","title":"Authenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335","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":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00547,"percentile":0.46353,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2023-07-10T06:29:47Z","modified":"2026-06-17T04:09:17Z","products":[{"vendor":"osnexus","product":"quantastor"}],"references":[{"url":"https://www.wbsec.nl/osnexus","tags":["third-party-advisory","technical-description","exploit","x_transferred","Third Party Advisory"]},{"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-2021-42083","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://nvd.nist.gov/vuln/detail/CVE-2021-42083"},{"url":"https://csirt.divd.nl/DIVD-2021-00020"},{"url":"https://github.com/advisories/GHSA-9c8q-55w7-h67h"}],"sources":{"cve":[{"id":"CVE-2021-42083","title":"Authenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335","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":"2023-07-10T06:29:47.782Z","modified":"2025-09-22T06:40:07.586Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29069","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":"2023-07-10T06:29:47Z","modified":"2025-09-22T06:40:07Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T20:31:41.254663Z"}],"ghsa":[{"id":"GHSA-9c8q-55w7-h67h","title":"An authenticated attacker is able to create alerts that trigger a stored XSS attack. ","description":"An authenticated attacker is able to create alerts that trigger a stored XSS attack. ","status":"published","published":"2023-07-10T18:30:47Z","modified":"2024-10-16T12:31:54Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:58:31.476115Z"}],"nvd":[{"id":"CVE-2021-42083","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":"2023-07-10T16:15:47.69Z","modified":"2026-06-17T04:09:17.083Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}