CVE-2025-62783 is a vulnerability identified in the InventoryGui library, a tool widely used for creating chest graphical user interfaces (GUIs) in Bukkit/Spigot Minecraft server plugins. The issue affects versions prior to 1.6.2-SNAPSHOT and arises from improper enforcement of a single, unique action within the GuiStorageElement component, classified under CWE-837. Specifically, when the experimental Bundle item feature is enabled on the server, this flaw permits item duplication by exploiting the lack of proper action enforcement. This duplication can undermine the integrity of in-game economies and inventories by allowing unauthorized replication of items, which can disrupt gameplay balance and server trustworthiness. The vulnerability has a CVSS 3.1 base score of 5.0, indicating medium severity, with an attack vector of network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), and a scope change (S:C). The impact is limited to integrity loss (I:L) without affecting confidentiality or availability. No public exploits have been reported to date, but the vulnerability’s presence in a popular Minecraft plugin ecosystem makes it a potential target for abuse. The issue was publicly disclosed on October 27, 2025, and resolved in version 1.6.2-SNAPSHOT of InventoryGui. The vulnerability’s exploitation requires an attacker to have low-level privileges on the server, which is typical for plugin-level attacks, and network access to the affected server. This vulnerability highlights the risks of enabling experimental features without thorough security validation in multiplayer gaming environments.

For European organizations operating Minecraft servers or hosting gaming communities, this vulnerability can lead to significant integrity issues within the game environment. Item duplication can distort in-game economies, potentially causing financial losses for servers that monetize virtual goods or rely on balanced gameplay for user retention. It may also damage the reputation of server operators and hosting providers if exploited by malicious actors, leading to loss of player trust and reduced user engagement. While the vulnerability does not directly compromise confidentiality or availability, the integrity breach can facilitate cheating, unfair advantages, and economic exploitation. This could indirectly affect business continuity if server operators must take servers offline to remediate or if player base declines due to perceived unfairness. Additionally, European organizations involved in e-sports or competitive Minecraft events may face competitive integrity issues. The medium severity rating reflects that exploitation requires some privileges and is limited to specific plugin versions with experimental features enabled, somewhat reducing the overall risk but not eliminating it.

To mitigate CVE-2025-62783, European organizations should promptly upgrade all instances of the InventoryGui library to version 1.6.2-SNAPSHOT or later, where the vulnerability is fixed. If immediate upgrading is not feasible, administrators should disable the experimental Bundle item feature on their servers to prevent exploitation. Server operators should audit their plugin configurations to identify any use of vulnerable InventoryGui versions and experimental features. Implement strict access controls to limit privileges on Minecraft servers, reducing the risk that attackers can exploit this vulnerability. Regularly monitor server logs for unusual item duplication patterns or suspicious activity indicative of exploitation attempts. Additionally, consider employing server-side integrity checks or anti-cheat plugins that can detect and prevent item duplication. Maintaining up-to-date backups of server data can also help recover from any integrity damage caused by exploitation. Finally, educate server administrators and plugin developers about the risks of enabling experimental features without security validation.