Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.
https://www.drupal.org/sa-core-2021-001
https://www.debian.org/security/2021/dsa-4894
https://security.gentoo.org/glsa/202101-23
https://lists.debian.org/debian-lts-announce/2021/04/msg00007.html
https://lists.debian.org/debian-lts-announce/2021/01/msg00018.html
https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916