{"cve":"CVE-2012-0475","nvd":{"published":"2012-04-25T10:10:17.683","modified":"2026-06-16T23:37:22.310","status":"Modified","description":"Mozilla Firefox 4.x through 11.0, Thunderbird 5.0 through 11.0, and SeaMonkey before 2.9 do not properly construct the Origin and Sec-WebSocket-Origin HTTP headers, which might allow remote attackers to bypass an IPv6 literal ACL via a cross-site (1) XMLHttpRequest or (2) WebSocket operation involving a nonstandard port number and an IPv6 address that contains certain zero fields.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://secunia.com/advisories/48972","http://secunia.com/advisories/49047","http://secunia.com/advisories/49055","http://www.mozilla.org/security/announce/2012/mfsa2012-28.html","http://www.securityfocus.com/bid/53230"],"products":["mozilla:firefox","mozilla:seamonkey","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T20:24:00.973572543+00:00"},"epss":{"cve":"CVE-2012-0475","score":0.01889,"percentile":0.79542,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}