Cross-Site Scripting (XSS) Vulnerability in Mozilla Firefox

CVE-2015-4490 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:P/A:N

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.

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