Description
admin/app/mediamanager in Schlix CMS 2.1.8-7 allows Authenticated Unrestricted File Upload, leading to remote code execution. NOTE: "While inadvertently allowing a PHP file to be uploaded via Media Manager was an oversight, it still requires an admin permission. We think it's pretty rare for an administrator to exploit a bug on his/her own site to own his/her own site.
References
- https://www.schlix.com/html/schlix-cms-downloads.html
- https://gurelahmet.com/schlix-cms-v2-1-8-7-authenticated-unrestricted-file-upload-to-rce/
- https://www.incibe-cert.es/en/early-warning/vulnerabilities/cve-2019-11021
- https://vuldb.com/?id.144129
- https://www.schlix.com/news/security/cve-2019-11021-for-older-schlix-cms-v2-1-8-7-november-2018.html