CVE-2025-62783 is a vulnerability classified under CWE-837 (Improper Enforcement of a Single, Unique Action) found in the InventoryGui library developed by Phoenix616, which is widely used to create chest graphical user interfaces (GUIs) for Bukkit/Spigot Minecraft server plugins. The affected versions are all prior to 1.6.2-SNAPSHOT. The vulnerability arises when the experimental Bundle item feature is enabled on the server, which allows plugins utilizing the GuiStorageElement component to inadvertently permit item duplication. This occurs because the library fails to properly enforce the uniqueness of certain actions, enabling attackers with low privileges (PR:L) and network access (AV:N) to duplicate items without requiring user interaction (UI:N). The scope is changed (S:C) because the duplication can affect multiple users or server states. The impact is limited to integrity (I:L) with no direct confidentiality or availability impact. The vulnerability was published on October 27, 2025, and no known exploits have been reported in the wild. The issue is resolved in version 1.6.2-SNAPSHOT of InventoryGui. Given the nature of Minecraft servers and the popularity of Bukkit/Spigot plugins, this vulnerability could be exploited to gain unfair advantages or disrupt in-game economies by duplicating valuable items, potentially undermining server integrity and player trust.

For European organizations operating Minecraft servers, especially those hosting multiplayer environments or running Bukkit/Spigot plugins that depend on InventoryGui, this vulnerability poses a risk to the integrity of in-game assets. Item duplication can lead to economic imbalance within game servers, loss of player trust, and potential reputational damage for server operators. While it does not directly compromise sensitive data or server availability, the integrity breach could be exploited for cheating or fraud in competitive or commercial gaming environments. This may also indirectly affect organizations that rely on Minecraft servers for educational or promotional purposes. The impact is more pronounced for servers enabling the experimental Bundle item feature, which is not enabled by default, thus limiting exposure. However, servers that have enabled this feature to leverage new gameplay mechanics are at higher risk.

The primary mitigation is to upgrade the InventoryGui library to version 1.6.2-SNAPSHOT or later, where the vulnerability is fixed. Server administrators should audit their plugin dependencies to confirm the InventoryGui version in use. If immediate upgrading is not feasible, disabling the experimental Bundle item feature on the server will prevent exploitation of the vulnerability. Additionally, server operators should monitor plugin updates and maintain strict version control to avoid running vulnerable versions. Implementing server-side logging and anomaly detection to identify unusual item duplication patterns can help detect exploitation attempts. Finally, educating plugin developers about secure usage of GuiStorageElement and avoiding experimental features in production environments can reduce future risks.