Vulnerability Database

315,294

Total vulnerabilities in the database

CVE-2015-4520

Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header.

  • Published: Sep 24, 2015
  • Updated: Nov 9, 2025
  • CVE: CVE-2015-4520
  • Severity: Medium
  • Exploit:

CVSS v2:

  • Severity: Medium
  • Score: 6.4
  • AV:N/AC:L/Au:N/C:P/I:P/A:N

CWEs:

Software From Fixed in
mozilla / firefox - 40.0.3.x
mozilla / firefox 38.0 38.0.x
mozilla / firefox 38.0.1 38.0.1.x
mozilla / firefox 38.0.5 38.0.5.x
mozilla / firefox 38.1.0 38.1.0.x
mozilla / firefox 38.1.1 38.1.1.x
mozilla / firefox 38.2.0 38.2.0.x
mozilla / firefox 38.2.1 38.2.1.x