A vulnerability classified as critical has been found in MAGESH-K21 Online-College-Event-Hall-Reservation-System 1.0. Affected is an unknown function of the file /admin/update-rooms.php. The manipulation leads to unrestricted upload. Using CWE to declare the problem leads to CWE-434. The weakness was presented 03/15/2024 by Joshua Lictan (Hua Tong). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-2531. It is possible to launch 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 current price for an exploit might be approx. USD $0-$5k at the moment. The MITRE ATT&CK project declares the attack technique as T1608.002. It is declared as proof-of-concept. The exploit is shared for download at github.com. As 0-day the estimated underground price was around $0-$5k. The vendor was contacted early about this disclosure but did not respond in any way. A possible mitigation has been published even before and not after the disclosure of the vulnerability.