VULNERABILITY INTELLIGENCE

CVE-2015-4490

CVSS score4.3 MEDIUM
EPSS probability2.44%
CISA KEVNot currently listed
Published2015-08-16
Last modified2026-06-17
CVSS vectorAV:N/AC:M/Au:N/C:N/I:P/A:N

Description

The nsCSPHostSrc::permits function in dom/security/nsCSPUtils.cpp in Mozilla Firefox before 40.0 does not implement the Content Security Policy Level 2 exceptions for the blob, data, and filesystem URL schemes during wildcard source-expression matching, which might make it easier for remote attackers to conduct cross-site scripting (XSS) attacks by leveraging unexpected policy-enforcement behavior.

Weakness classification

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Primary references