VULNERABILITY INTELLIGENCE
CVE-2014-8639
CVSS score6.8 MEDIUM
EPSS probability1.90%
CISA KEVNot currently listed
Published2015-01-14
Last modified2026-06-17
CVSS vectorAV:N/AC:M/Au:N/C:P/I:P/A:P
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.