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bdu:2025-10404

EUVD-2026-243710

fkie_cve-2025-30220

GeoServer is an open source server that allows users to share and edit geospatial data. GeoTools Schema class use of Eclipse XSD library to represent schema data structure is vulnerable to XML External Entity (XXE) exploit. This impacts whoever exposes XML processing with gt-xsd-core involved in parsing, when the documents carry a reference to an external XML schema. The gt-xsd-core Schemas class is not using the EntityResolver provided by the ParserHandler (if any was configured). This also impacts users of gt-wfs-ng DataStore where the ENTITY_RESOLVER connection parameter was not being used as intended. This vulnerability is fixed in GeoTools 33.1, 32.3, 31.7, and 28.6.1, GeoServer 2.27.1, 2.26.3, and 2.25.7, and GeoNetwork 4.4.8 and 4.2.13.

GHSA-jj54-8f66-c5pc — [XBOW-025-068] XML External Entity (XXE) Processing Vulnerability in GeoServer WFS Service

Affected: Maven: org.geoserver.web:gs-web-app, Maven: org.geoserver:gs-wfs

## Summary

GeoServer Web Feature Service (WFS) web service was found to be vulnerable to GeoTools CVE-2025-30220 XML External Entity (XXE) processing attack.

It is possible to trigger the parsing of external DTDs and entities, bypassing standard entity resolvers. This allows for Out-of-Band (OOB) data exfiltration of local files accessible by the GeoServer process, and Service Side Request Forgery (SSRF).

## Details

While direct entity resolution is managed by application property ENTITY_RESOLUTION_ALLOWLIST for XML Parsing, this restriction was not being used by the GeoTools library when building an in-memory XSD Library Schema representation.

This bypasses GeoServer's AllowListEntityResolver enabling XXE attacks.

## PoC

No public PoC is provided but this vulnerability has been confirmed to be exploitable through WFS service.

## Impact

* Information Disclosure:

This vulnerability allows unauthenticated attackers to read arbitrary files from the server's filesystem that are accessible to the GeoServer process. This can lead to exposure of sensitive information including configuration files, credentials, and system files. The attack can be performed remotely without authentication, making it particularly severe.

* Server-Side Request Forgery (SSRF) The mechanism inherently allows forcing GeoServer to make HTTP requests to arbitrary URLs, enabling SSRF attacks against internal network resources

## References

* [CVE-2025-30220](https://github.com/ge…

WID-SEC-W-2025-1294 — GeoServer: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GeoServer ausnutzen, um Informationen offenzulegen oder einen Denial-of-Service auszulösen.