{"id":"CVE-2021-34540","aliases":["EUVD-2021-21192","GHSA-7p7j-x9w2-xpj5"],"status":"published","title":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of...","description":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00867,"percentile":0.59013,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-11T11:26:02Z","modified":"2026-06-17T03:56:05Z","products":[{"vendor":"advantech","product":"webaccess"}],"references":[{"url":"https://www.advantech.com/support","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/ethancsyang/CveProject/tree/main/CVE-2021-34540","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34540"},{"url":"https://github.com/advisories/GHSA-7p7j-x9w2-xpj5"}],"sources":{"cve":[{"id":"CVE-2021-34540","description":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.","status":"published","published":"2021-06-11T11:26:02Z","modified":"2024-08-04T00:12:50.38Z","updated_at":"2026-11-02T14:33:11.244759Z"}],"euvd":[{"id":"EUVD-2021-21192","description":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.","status":"published","published":"2021-06-11T11:26:02Z","modified":"2024-08-04T00:12:50Z","updated_at":"2026-11-03T03:24:32.445199Z"}],"ghsa":[{"id":"GHSA-7p7j-x9w2-xpj5","title":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of...","description":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.","status":"published","published":"2022-05-24T19:05:11Z","modified":"2023-01-29T05:06:32Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:02.943866Z"}],"nvd":[{"id":"CVE-2021-34540","description":"Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.","status":"published","published":"2021-06-11T12:15:12.13Z","modified":"2026-06-17T03:56:05.647Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:54.439974Z"}]}}