VULNERABILITY INTELLIGENCE
CVE-2010-4508
CVSS score10 HIGH
EPSS probability1.27%
CISA KEVNot currently listed
Published2010-12-09
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Description
The WebSockets implementation in Mozilla Firefox 4 through 4.0 Beta 7 does not properly perform proxy upgrade negotiation, which has unspecified impact and remote attack vectors, related to an "inherent problem" with the WebSocket specification.