A vulnerability was found in SourceCodester Yoga Class Registration System 1.0. It has been classified as critical. This affects the function query of the file admin/categories/manage_category.php. The manipulation of the argument id leads to sql injection. The CWE definition for the vulnerability is CWE-89. The weakness was presented 03/13/2023. The advisory is shared at blog.csdn.net. This vulnerability is uniquely identified as CVE-2023-1366. It is possible to initiate the attack remotely. Technical details are available. Furthermore, there is an exploit available. The exploit has been disclosed to the public and may be used. The price for an exploit might be around USD $0-$5k at the moment. MITRE ATT&CK project uses the attack technique T1505 for this issue. It is declared as proof-of-concept. The exploit is shared for download at blog.csdn.net. We expect the 0-day to have been worth approximately $0-$5k. A possible mitigation has been published even before and not after the disclosure of the vulnerability.