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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.
Base Score
5.4
| Base Score | 5.4 |
|---|---|
| Vector String | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| Base Severity | Medium |
| Version | 3.0 |
| Attack Vector (AV) | NETWORK |
