{"id":"CVE-2021-31407","aliases":["EUVD-2021-0734","GHSA-25xc-jwfq-39jw"],"status":"published","title":"Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19","description":"Vulnerability in OSGi integration in com.vaadin:flow-server versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.02382,"percentile":0.8404,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-402","CWE-668"],"published":"2021-04-19T14:50:49Z","modified":"2026-10-24T10:51:24Z","fixes":[{"ecosystem":"Maven","package":"com.vaadin:flow-server","fixed_in":["6.0.1","2.4.8"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.vaadin:flow-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"last_affected":"6.0.0"},{"fixed":"6.0.1"}]}],"versions":["6.0.0"]},{"source":"ghsa","ecosystem":"Maven","package":"com.vaadin:flow-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.2.0"},{"last_affected":"2.4.7"},{"fixed":"2.4.8"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.vaadin:flow-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.2.0"},{"fixed":"2.4.8"}]}],"versions":["1.2.0","1.2.1","1.2.2","1.2.3","1.2.4","1.2.5","1.3.0","1.4.0","1.4.1","1.4.2","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","2.0.0","2.0.1","2.0.10","2.0.11","2.0.12","2.0.13","2.0.14","2.0.15","2.0.16","2.0.17","2.0.18","2.0.19","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.1.0","2.1.0.beta2","2.1.1","2.1.2","2.1.3","2.1.4","2.1.5","2.1.6","2.1.7","2.1.8","2.1.9","2.2.0","2.2.0.alpha11","2.2.1","2.2.2","2.2.3","2.3.0","2.3.0.beta1","2.3.1","2.3.2","2.3.3","2.3.4","2.3.5","2.3.6","2.3.7","2.4.0","2.4.1","2.4.2","2.4.3","2.4.4","2.4.5","2.4.6","2.4.7"]},{"source":"osv","ecosystem":"Maven","package":"com.vaadin:flow-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.1"}]}],"versions":["6.0.0"]}],"products":[{"vendor":"flow","product":"flow-server"},{"vendor":"vaadin","product":"flow"},{"vendor":"vaadin","product":"flow-server"},{"vendor":"vaadin","product":"vaadin"}],"references":[{"url":"https://vaadin.com/security/cve-2021-31407","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/vaadin/osgi/issues/50","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/vaadin/flow/pull/10229","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/vaadin/flow/pull/10269","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/vaadin/flow/security/advisories/GHSA-25xc-jwfq-39jw","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31407","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-25xc-jwfq-39jw"},{"url":"https://github.com/vaadin/flow","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-31407","title":"Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19","description":"Vulnerability in OSGi integration in com.vaadin:flow-server versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.","status":"published","published":"2021-04-23T16:05:41.485Z","modified":"2024-09-16T17:17:43.411Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-402"],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-0734","description":"Vulnerability in OSGi integration in com.vaadin:flow-server versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.","status":"published","published":"2021-04-23T16:05:41Z","modified":"2024-09-16T17:17:43Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T00:55:43.899381Z"}],"ghsa":[{"id":"GHSA-25xc-jwfq-39jw","title":"OSGi applications using Vaadin 12-14 and 19 vulnerable to server classes and resources exposure","description":"Vulnerability in OSGi integration in `com.vaadin:flow-server` versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.\n\n- 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request.","status":"published","published":"2021-04-23T16:15:08.767Z","modified":"2026-06-17T03:51:43.45Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-402","CWE-668"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-31407","description":"Vulnerability in OSGi integration in com.vaadin:flow-server versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.","status":"published","published":"2021-04-23T16:15:08.767Z","modified":"2026-10-24T10:51:24.64499956Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"GHSA-25xc-jwfq-39jw","title":"OSGi applications using Vaadin 12-14 and 19 vulnerable to server classes and resources exposure","description":"Vulnerability in OSGi integration in `com.vaadin:flow-server` versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.\n\n- https://vaadin.com/security/cve-2021-31407","status":"published","published":"2021-04-19T14:50:49Z","modified":"2023-11-08T04:05:48.34495Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-402","CWE-668"],"updated_at":"2026-11-02T15:46:33.956911Z"}]}}