Improper Enforcement of a Single, Unique Action

The product requires that an actor should only be able to perform an action once, or to have only one unique action, but the product does not enforce or improperly enforces this restriction.


In various applications, a user is only expected to perform a certain action once, such as voting, requesting a refund, or making a purchase. When this restriction is not enforced, sometimes this can have security implications. For example, in a voting application, an attacker could attempt to "stuff the ballot box" by voting multiple times. If these votes are counted separately, then the attacker could directly affect who wins the vote. This could have significant business impact depending on the purpose of the product.

See Also

Comprehensive Categorization: Insufficient Control Flow Management

Weaknesses in this category are related to insufficient control flow management.

Business Logic Errors

Weaknesses in this category identify some of the underlying problems that commonly allow attackers to manipulate the business logic of an application. Errors in busine...

Behavioral Problems

Weaknesses in this category are related to unexpected behaviors from code that an application uses.

Comprehensive CWE Dictionary

This view (slice) covers all the elements in CWE.

Weakness Base Elements

This view (slice) displays only weakness base elements.

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