Cross-Site Scripting (XSS) Vulnerability in Firefox and Thunderbird

CVE-2017-7823 · MEDIUM Severity

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

The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

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