Threats affecting pkg:npm/apostrophecms/import-export

ApostropheCMS versions prior to 4.33.0 and its import-export module prior to 3.7.0 contain an uncontrolled resource consumption vulnerability. The import routes invoke a middleware that allows unauthenticated users to initiate upload processes and consume resources before authentication checks occur. This flaw can lead to denial of service due to resource exhaustion. The issue is resolved in ApostropheCMS 4.33.0 and import-export 3.7.0.

CVE-2026-32731 is a critical path traversal vulnerability in ApostropheCMS's import-export module prior to version 3.5.3. The vulnerability arises because the extract() function in gzip.js uses path.join() without sanitizing or resolving traversal sequences like '.. /', allowing crafted tar.gz files to write files outside the intended directory. Any user with Global Content Modify permission, typically content editors or site managers, can exploit this by uploading a malicious archive via the CMS import UI. This can lead to arbitrary file writes anywhere the Node.