{"id":"CVE-2021-22849","aliases":["EUVD-2021-9984","GHSA-j57c-7v46-28f4"],"status":"published","title":"Hyweb HyCMS-J1 - Stored XSS","description":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00516,"percentile":0.44365,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-01-22T08:30:21Z","modified":"2026-06-17T03:37:52Z","products":[{"vendor":"hyweb","product":"hycms-j1"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-4318-09cd3-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22849"},{"url":"https://github.com/advisories/GHSA-j57c-7v46-28f4"}],"sources":{"cve":[{"id":"CVE-2021-22849","title":"Hyweb HyCMS-J1 - Stored XSS","description":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.","status":"published","published":"2021-01-22T08:30:21.58Z","modified":"2024-09-16T16:12:45.703Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:57.701381Z"}],"euvd":[{"id":"EUVD-2021-9984","description":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.","status":"published","published":"2021-01-22T08:30:21Z","modified":"2024-09-16T16:12:45Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:55:53.971387Z"}],"ghsa":[{"id":"GHSA-j57c-7v46-28f4","title":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in...","description":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.","status":"published","published":"2022-05-24T17:40:04Z","modified":"2023-01-29T05:05:08Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:43.481618Z"}],"nvd":[{"id":"CVE-2021-22849","description":"Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.","status":"published","published":"2021-01-22T09:15:13.79Z","modified":"2026-06-17T03:37:52.537Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","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"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:49.660551Z"}]}}