A Content Security Policy bypass has been found in Firefox before 74. 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.
A Content Security Policy bypass has been found in Firefox before 74. 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.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6813 https://bugzilla.mozilla.org/show_bug.cgi?id=1605814
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