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Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11720
Acknowledgments: Name: the Mozilla project Upstream: Rakesh Mane
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-2019-11720