The unstructured library provides open-source components for ingesting and pre-processing images and text documents, such as PDFs, HTML, Word docs, and many more. From 0.4.7 until 0.24.0, the url argument of partition, partition_html, and partition_md is fetched without host validation in unstructured/partition/auto.py, unstructured/partition/html/partition.py, and unstructured/partition/md.py. An attacker who controls that URL can make a server-side ingestion service request loopback addresses, internal HTTP services, or cloud metadata endpoints through direct targets, redirects, or DNS rebinding. The response body is returned as Element text, allowing internal response disclosure, and side-effecting GET endpoints may also be triggered. This issue is fixed in version 0.24.0.

The unstructured library, an open-source tool for ingesting and pre-processing documents such as PDFs, HTML, and Word files, contains a Server-Side Request Forgery (SSRF) vulnerability affecting versions 0.4.7 through 0.24.0. The vulnerability exists in the url argument of partition, partition_html, and partition_md functions, which fetch URLs without host validation. An attacker who controls the URL can force the server to make requests to loopback addresses, internal HTTP services, or cloud metadata endpoints. Exploitation vectors include direct targets, redirects, and DNS rebinding attacks. The response body is returned as Element text, enabling disclosure of internal service responses. Additionally, side-effecting GET endpoints may be unintentionally triggered. The issue has been patched in version 0.24.0, with fixes committed to the official GitHub repository.