CVE ID:	CVE-2021-23953
Description:	If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-23953 https://bugzilla.mozilla.org/show_bug.cgi?id=1683940 https://bugzilla.mozilla.org/show_bug.cgi?id=1683940 https://www.mozilla.org/security/advisories/mfsa2021-03/ https://www.mozilla.org/security/advisories/mfsa2021-03/ https://www.mozilla.org/security/advisories/mfsa2021-04/ https://www.mozilla.org/security/advisories/mfsa2021-04/ https://www.mozilla.org/security/advisories/mfsa2021-05/ https://www.mozilla.org/security/advisories/mfsa2021-05/