Unrestricted Upload of File with Dangerous Type vulnerability in Unisign Bookreen allows OS Command Injection. This issue affects Bookreen: before 3.0.0.
https://github.com/ccelikanil/CVEs
https://github.com/HVLRED/Security-Research
https://www.usom.gov.tr/bildirim/tr-23-0489
https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-23-0489