{"cve":"CVE-2014-8639","nvd":{"published":"2015-01-14T11:59:07.930","modified":"2026-06-17T00:17:04.593","status":"Modified","description":"Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 do not properly interpret Set-Cookie headers within responses that have a 407 (aka Proxy Authentication Required) status code, which allows remote HTTP proxy servers to conduct session fixation attacks by providing a cookie name that corresponds to the session cookie of the origin server.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://linux.oracle.com/errata/ELSA-2015-0046.html","http://linux.oracle.com/errata/ELSA-2015-0047.html","http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00014.html","http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00032.html","http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00033.html"],"products":["mozilla:firefox","mozilla:firefox_esr","mozilla:seamonkey","mozilla:thunderbird"],"source":"nvd","synced_at":"2026-10-19T20:35:35.528235705+00:00"},"epss":{"cve":"CVE-2014-8639","score":0.01902,"percentile":0.79694,"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."]}