CVE ID:	CVE-2021-23973
Description:	When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-23973 Debian Security Information: DSA-4866 (Google Search) https://www.debian.org/security/2021/dsa-4866 https://security.gentoo.org/glsa/202104-09 https://security.gentoo.org/glsa/202104-10 https://bugzilla.mozilla.org/show_bug.cgi?id=1690976 https://bugzilla.mozilla.org/show_bug.cgi?id=1690976 https://www.mozilla.org/security/advisories/mfsa2021-07/ https://www.mozilla.org/security/advisories/mfsa2021-07/ https://www.mozilla.org/security/advisories/mfsa2021-08/ https://www.mozilla.org/security/advisories/mfsa2021-08/ https://www.mozilla.org/security/advisories/mfsa2021-09/ https://www.mozilla.org/security/advisories/mfsa2021-09/ https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html