A vulnerability has been found in IBOS up to 4.5.4 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /?r=email/api/mark&op=delFromSend. The manipulation of the argument emailids leads to sql injection. The CWE definition for the vulnerability is CWE-89. The weakness was published 03/30/2023. It is possible to read the advisory at gitee.com. This vulnerability is known as CVE-2023-1747. The attack can be launched remotely. Technical details are available. Furthermore, there is an exploit available. The exploit has been disclosed to the public and may be used. The pricing for an exploit might be around USD $0-$5k at the moment. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK. It is declared as proof-of-concept. It is possible to download the exploit at gitee.com. We expect the 0-day to have been worth approximately $0-$5k. Upgrading to version 4.5.5 is able to address this issue. It is recommended to upgrade the affected component. A possible mitigation has been published before and not just after the disclosure of the vulnerability.