Tails 4.8 fixes many security issues that affect Tails 4.7. You should upgrade to Tails 4.8 as soon as possible.

• Tor Browser: MFSA to be announced
• Thunderbird: Mozilla Foundation Security Advisory 2020-22
• Linux: CVE-2020-13974, CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2019-19462, CVE-2020-10732, CVE-2020-10757, CVE-2020-0543, CVE-2020-12464, CVE-2020-12770, CVE-2020-10711, CVE-2020-13143, CVE-2020-12655, CVE-2020-11884
• libgnutls30: Debian Security Advisory 4697
• intel-microcode: Debian Security Advisory 4701.