Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-0592F49F-B3B8-4260-B648-D1718762656C:
Mozilla Foundation reports:
CVE-2019-9811: Sandbox escape via installation of malicious language pack
CVE-2019-11711: Script injection within domain through inner window reuse
CVE-2019-11712: Cross-origin POST requests can be made with NPAPI plugins by following 308 redirects
CVE-2019-11713: Use-after-free with HTTP/2 cached stream
CVE-2019-11714: NeckoChild can trigger crash when accessed off of main thread
CVE-2019-11729: Empty or malformed p256-ECDH public keys may trigger a segmentation fault
CVE-2019-11715: HTML parsing error can contribute to content XSS
CVE-2019-11716: globalThis not enumerable until accessed
CVE-2019-11717: Caret character improperly escaped in origins
CVE-2019-11718: Activity Stream writes unsanitized content to innerHTML
CVE-2019-11719: Out-of-bounds read when importing curve25519 private key
CVE-2019-11720: Character encoding XSS vulnerability
CVE-2019-11721: Domain spoofing through unicode latin 'kra' character
CVE-2019-11730: Same-origin policy treats all files in a directory as having the same-origin
CVE-2019-11723: Cookie leakage during add-on fetching across private browsing boundaries
CVE-2019-11724: Retired site input.mozilla.org has remote troubleshooting permissions
CVE-2019-11725: Websocket resources bypass safebrowsing protections
CVE-2019-11727: PKCS#1 v1.5 signatures can be used for TLS 1.3
CVE-2019-11728: Port scanning through Alt-Svc header
CVE-2019-11710: Memory safety bugs fixed in Firefox 68
CVE-2019-11709: Memory safety bugs fixed in Firefox 68 and Firefox ESR 60.8
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