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. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6813
Acknowledgments: Name: the Mozilla project Upstream: Matheus Vrech
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-6813