{"cve":"CVE-2020-28481","nvd":{"published":"2021-01-19T15:15:12.060","modified":"2026-06-17T03:10:31.373","status":"Modified","description":"The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-346"],"references":["https://github.com/socketio/socket.io/issues/3671","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1056358","https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1056357","https://snyk.io/vuln/SNYK-JS-SOCKETIO-1024859","https://github.com/socketio/socket.io/issues/3671"],"products":["socket:socket.io"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2020-28481","score":0.00745,"percentile":0.54795,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fxwf-4rqh-v8g3","url":"https://osv.dev/vulnerability/GHSA-fxwf-4rqh-v8g3","summary":"CORS misconfiguration in socket.io","modified":"2025-01-14T08:56:59.028253Z","packages":[{"ecosystem":"npm","name":"socket.io","purl":"pkg:npm/socket.io","ranges":["<2.4.0"],"fixed":["2.4.0"]}]}],"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."]}