Ghostwriter before 7.1.2 fails to validate template ownership in the report template swap endpoint, allowing attackers to attach client-scoped templates from other clients to their own reports. Attackers can exploit sequential template primary keys to enumerate and attach foreign templates, then generate reports to disclose template contents including letterhead, boilerplate, and methodology text.

Ghostwriter versions before 7.1.2 contain a vulnerability in the report template swap endpoint that fails to validate template ownership. This allows authenticated attackers to attach client-scoped templates belonging to other clients to their own reports. By exploiting sequential template primary keys, attackers can enumerate and attach foreign templates. Once attached, attackers can generate reports to extract sensitive template contents including letterhead, boilerplate text, and methodology documentation. This constitutes a cross-client information disclosure vulnerability affecting multi-tenant deployments of Ghostwriter. The issue has been patched in version 7.1.2 with a fix available in the referenced commit.