{"id":"CVE-2021-42335","aliases":["EUVD-2021-29309","GHSA-89rc-4jgm-q84x"],"status":"published","title":"Huachu Digital Technology Co.,Ltd. Easytest - Stored XSS","description":"Easytest bulletin board management function of online learning platform does not filter special characters. After obtaining a user’s privilege, remote attackers can inject JavaScript and execute stored XSS attack.","severity":{"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":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00586,"percentile":0.48333,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-10-15T12:10:38Z","modified":"2026-06-17T04:09:40Z","products":[{"vendor":"huachu digital technology co.,ltd.","product":"easytest"},{"vendor":"huaju","product":"easytest_online_learning_test_platform"},{"vendor":"wp grids","product":"easytest"}],"references":[{"url":"https://www.twcert.org.tw/tw/cp-132-5206-3cd3f-1.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42335"},{"url":"https://github.com/advisories/GHSA-89rc-4jgm-q84x"}],"sources":{"cve":[{"id":"CVE-2021-42335","title":"Huachu Digital Technology Co.,Ltd. Easytest - Stored XSS","description":"Easytest bulletin board management function of online learning platform does not filter special characters. After obtaining a user’s privilege, remote attackers can inject JavaScript and execute stored XSS attack.","status":"published","published":"2021-10-15T12:10:38.906Z","modified":"2024-09-16T19:05:14.166Z","cvss":[{"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":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29309","description":"Easytest bulletin board management function of online learning platform does not filter special characters. After obtaining a user’s privilege, remote attackers can inject JavaScript and execute stored XSS attack.","status":"published","published":"2021-10-15T12:10:38Z","modified":"2024-09-16T19:05:14Z","cvss":[{"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"}],"updated_at":"2026-11-03T00:55:26.31684Z"}],"ghsa":[{"id":"GHSA-89rc-4jgm-q84x","title":"Easytest bulletin board management function of online learning platform does not filter special...","description":"Easytest bulletin board management function of online learning platform does not filter special characters. After obtaining a user’s privilege, remote attackers can inject JavaScript and execute stored XSS attack.","status":"published","published":"2022-05-24T22:28:26Z","modified":"2023-01-30T05:05:35Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:47:18.801591Z"}],"nvd":[{"id":"CVE-2021-42335","description":"Easytest bulletin board management function of online learning platform does not filter special characters. After obtaining a user’s privilege, remote attackers can inject JavaScript and execute stored XSS attack.","status":"published","published":"2021-10-15T12:15:07.947Z","modified":"2026-06-17T04:09:40.033Z","cvss":[{"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":"secondary"},{"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":"2026-11-02T14:06:59.689345Z"}]}}