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Mozilla: Incorrect HTML parsing results in XSS bypass technique

🗓️ 29 Oct 2019 13:48:28Reported by RedHatType 
redhat
 redhat
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Firefox and Thunderbird flaw: null bytes in entities cause comments to be parsed as code, enabling cross site scripting and masking.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8ppc64lethunderbird0:68.2.0-1.el8_0thunderbird-0:68.2.0-1.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8x86_64thunderbird0:68.2.0-1.el8_0thunderbird-0:68.2.0-1.el8_0.x86_64.rpm
Red Hat Enterprise Linux8ppc64lethunderbird-debuginfo0:68.2.0-1.el8_0thunderbird-debuginfo-0:68.2.0-1.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8x86_64thunderbird-debuginfo0:68.2.0-1.el8_0thunderbird-debuginfo-0:68.2.0-1.el8_0.x86_64.rpm
Red Hat Enterprise Linux8ppc64lethunderbird-debugsource0:68.2.0-1.el8_0thunderbird-debugsource-0:68.2.0-1.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8x86_64thunderbird-debugsource0:68.2.0-1.el8_0thunderbird-debugsource-0:68.2.0-1.el8_0.x86_64.rpm

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28 Jun 2026 12:32Current
7.3High risk
Vulners AI Score7.3
CVSS 24.3
CVSS 3.16.1
EPSS0.00994
5