Indirect disclosure is the exposure of sensitive information through context, metadata, wording, or relationships in a document rather than through an obvious sensitive field. A page may show only names, dates, or case references, but those details can still let an attacker infer health status, financial distress, employment status, location, or involvement in a protected process. In cyber security and privacy engineering, this matters because disclosure risk is not limited to direct leaks of passwords or IDs; it also includes information that becomes sensitive once it is searchable, correlated, or combined with other sources.
In real attacks, indirect disclosure often appears when public records, error messages, logs, document titles, filenames, or indexes reveal more than intended. Defenders reduce the risk with data minimization, access control, careful redaction, and publication review. They also test whether a document can be safely published without enabling inference. If a notice or file can be used to deduce private facts, it may be a security issue even when no explicit secret is shown.