CVE-2020-6813 Information

Description

When protecting CSS blocks with the nonce feature of Content Security Policy the @import statement in the CSS block could allow an attacker to inject arbitrary styles bypassing the intent of the Content Security Policy. This vulnerability affects Firefox 74.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1605814 https://www.mozilla.org/security/advisories/mfsa2020-08/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3