WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, whic...

References

• advisory http://www.securityfocus.com/bid/104569
• advisory https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/
• advisory https://lists.debian.org/debian-lts-announce/2018/07/msg00046.html
• advisory https://wpvulndb.com/vulnerabilities/9100
• advisory https://www.debian.org/security/2018/dsa-4250
• report http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html