CVE-2025-62378 in commandkit
Summary
by MITRE • 10/15/2025
CommandKit is the discord.js meta-framework for building Discord bots. In versions 1.2.0-rc.1 through 1.2.0-rc.11, a logic flaw exists in the message command handler that affects how the commandName property is exposed to both middleware functions and command execution contexts when handling command aliases. When a message command is invoked using an alias, the ctx.commandName value reflects the alias rather than the canonical command name. This occurs in both middleware functions and within the command's own run function. Although not explicitly documented, CommandKit's examples and guidance around middleware usage implicitly convey that ctx.commandName represents the canonical command identifier. Middleware examples in the documentation consistently use ctx.commandName to reference the command being executed. Developers who assume ctx.commandName is canonical may introduce unintended behavior when relying on it for logic such as permission checks, rate limiting, or audit logging. This could allow unauthorized command execution or inaccurate access control decisions. Slash commands and context menu commands are not affected. This issue has been patched in version 1.2.0-rc.12, where ctx.commandName now consistently returns the actual canonical command name regardless of the alias used to invoke it.
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Analysis
by VulDB Data Team • 10/15/2025
The vulnerability CVE-2025-62378 resides within CommandKit, a popular discord.js meta-framework designed for building Discord bots. This framework provides developers with structured approaches to handle message commands, middleware, and various bot functionalities. The issue manifests as a logic flaw in the message command handler that specifically affects how command names are processed when aliases are utilized. The vulnerability impacts versions 1.2.0-rc.1 through 1.2.0-rc.11, creating a discrepancy between expected and actual behavior in command identification and execution contexts. The core problem emerges from the inconsistent exposure of the commandName property, which should represent the canonical command identifier but instead reflects the alias used for invocation.
The technical flaw directly relates to the command handler's logic where ctx.commandName value becomes misaligned with developer expectations. When a user invokes a command through an alias, the system incorrectly exposes the alias name rather than the canonical command name to both middleware functions and the command's execution context. This inconsistency creates a fundamental mismatch between what documentation and examples suggest should occur versus what actually happens in practice. The framework's documentation and middleware examples implicitly establish that ctx.commandName represents the canonical command identifier, yet the implementation fails to maintain this contract. This design flaw violates the principle of least surprise and creates potential security implications when developers build logic around this property.
The operational impact of this vulnerability extends beyond simple naming discrepancies to potentially compromise security controls and access management. Developers who rely on ctx.commandName for permission checks, rate limiting, or audit logging may encounter unexpected behavior when commands are invoked through aliases. The inconsistency could allow unauthorized access to commands that should be restricted, or conversely, prevent legitimate users from accessing commands that should be available. This vulnerability particularly affects systems that implement granular access controls, where the canonical command name is crucial for determining appropriate permissions and access levels. The security implications become more pronounced when considering that middleware functions are often used for security-related operations, making this flaw potentially exploitable for privilege escalation or access control bypass scenarios.
The vulnerability's classification aligns with CWE-252, which addresses "Unchecked Return Value," and CWE-707, which covers "Improper Neutralization of Input," as the inconsistent command name handling represents a failure to properly validate and normalize command identification. From an ATT&CK perspective, this vulnerability maps to T1078, "Valid Accounts," and T1566, "Phishing," as it could enable attackers to craft malicious commands that bypass security controls by exploiting the alias handling inconsistency. The issue is particularly concerning in environments where command aliases are used for administrative purposes or where different permission levels are assigned to canonical commands versus their aliases. The patch implemented in version 1.2.0-rc.12 resolves this by ensuring ctx.commandName consistently returns the actual canonical command name regardless of how the command was invoked, maintaining proper semantic consistency. This fix aligns with security best practices by ensuring predictable behavior in command identification and reducing opportunities for logic-based security bypasses. The resolution demonstrates proper input validation and normalization, where the framework now correctly handles the relationship between aliases and canonical names, thereby restoring expected behavior for middleware functions and command execution contexts.