The vulnerability identified as CVE-2025-62378 affects the CommandKit framework, a meta-framework built on discord.js for creating Discord bots. Specifically, versions from 1.2.0-rc.1 up to but not including 1.2.0-rc.12 contain a logic flaw in the message command handler related to the commandName property. When a command is invoked using an alias, the ctx.commandName value exposed to middleware and the command's run function incorrectly reflects the alias rather than the canonical command name. This behavior contradicts the implicit assumption in CommandKit's documentation and examples that ctx.commandName represents the canonical command identifier. Middleware relying on ctx.commandName for critical logic such as permission enforcement, rate limiting, or audit logging may therefore make incorrect decisions. For example, a middleware might allow execution of a command alias that should be restricted or fail to log the canonical command properly, leading to potential unauthorized command execution or inaccurate access control. Notably, this issue does not affect slash commands or context menu commands, limiting the scope to message commands only. The vulnerability requires an attacker to have local privileges to send commands to the bot, but no user interaction is needed beyond invoking the command alias. The CVSS 3.1 score is 6.1 (medium), reflecting limited attack vector (local), low complexity, and partial impact on confidentiality and high impact on integrity, with no availability impact. The vulnerability was patched in version 1.2.0-rc.12 by ensuring ctx.commandName always returns the canonical command name regardless of alias usage. No known exploits have been reported in the wild as of the publication date.

For European organizations deploying Discord bots using affected versions of CommandKit, this vulnerability can lead to unauthorized command execution or bypass of intended access controls. Bots often manage community moderation, user permissions, or automate sensitive operations; thus, incorrect command name resolution can cause middleware to misapply permission checks or rate limits. This may result in privilege escalation within the bot's operational context, unauthorized data access, or manipulation of bot behavior. Although the attack vector is local (an attacker must send commands to the bot), many organizations use Discord bots for internal or community management, increasing exposure. The integrity of bot operations is at risk, potentially undermining trust in automated moderation or logging. Confidentiality impact is limited but present if commands expose sensitive information. Availability is not impacted. The medium severity suggests a moderate risk, but the impact can be significant in environments where bots enforce critical policies or handle sensitive data. European organizations relying on CommandKit for Discord bot development should prioritize patching to prevent misuse and maintain operational security.

Organizations should upgrade all affected CommandKit instances to version 1.2.0-rc.12 or later, where the issue is fixed. Until upgrading, developers should audit middleware and command logic that depend on ctx.commandName to verify whether they assume it is canonical and adjust logic to explicitly resolve the canonical command name if possible. Implement additional validation in middleware to cross-check command aliases against a whitelist or mapping to canonical names before enforcing permissions or rate limits. Enhance logging to capture both alias and canonical command names to detect suspicious alias usage. Restrict bot command access to trusted users and channels to limit exposure. Employ runtime monitoring to detect anomalous command invocation patterns. Finally, review bot design to minimize reliance on ctx.commandName for security-critical decisions or supplement it with explicit canonical name resolution mechanisms.