{"cve":"CVE-2021-31407","nvd":{"published":"2021-04-23T16:15:08.767","modified":"2026-06-17T03:51:43.450","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-668","CWE-402"],"references":["https://github.com/vaadin/flow/pull/10229","https://github.com/vaadin/flow/pull/10269","https://github.com/vaadin/osgi/issues/50","https://vaadin.com/security/cve-2021-31407","https://github.com/vaadin/flow/pull/10229"],"products":["vaadin:flow","vaadin:vaadin"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-31407","score":0.02382,"percentile":0.83906,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-25xc-jwfq-39jw","url":"https://osv.dev/vulnerability/GHSA-25xc-jwfq-39jw","summary":"OSGi applications using Vaadin 12-14 and 19 vulnerable to server classes and resources exposure","modified":"2023-11-08T04:05:48.344950Z","packages":[{"ecosystem":"Maven","name":"com.vaadin:flow-server","purl":"pkg:maven/com.vaadin/flow-server","ranges":[">=1.2.0 <2.4.8"],"fixed":["2.4.8"]},{"ecosystem":"Maven","name":"com.vaadin:flow-server","purl":"pkg:maven/com.vaadin/flow-server","ranges":[">=6.0.0 <6.0.1"],"fixed":["6.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}