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Advisory record · GHSA-jj54-8f66-c5pc

[XBOW-025-068] XML External Entity (XXE) Processing Vulnerability in GeoServer WFS Service

CVSS 9.9 CriticalCriticalEPSS 0.44 · 98th percentile

Critical, because:

  • CVSS score 9.9: 9.0 or more.
  • CVSS score 9.9 (7.0 or more) and EPSS 0.44 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the GitHub Advisory Database at 10 Jun 2025, 20:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.geoserver.web:gs-web-appMaven>=2.27.0, <2.27.1 || >=2.26.0, <2.26.3 || <2.25.72.27.1, 2.26.3, 2.25.7
org.geoserver:gs-wfsMaven>=2.27.0, <2.27.1 || >=2.26.0, <2.26.3 || <2.25.72.27.1, 2.26.3, 2.25.7
Identifiers
GHSA-jj54-8f66-c5pc · CVE-2025-30220
Weakness (CWE)
CWE-611 · CWE-918
Tags
Published
10 Jun 2025
Updated
4 Feb 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GeoServer's gs-web-app and gs-wfs Maven packages are affected in versions from 2.27.0 before 2.27.1, from 2.26.0 before 2.26.3, and below 2.25.7. An unauthenticated attacker who can reach the WFS service can trigger XML external entity processing, which allows reading local files the GeoServer process can access and forcing server-side HTTP requests to internal resources. Upgrade to 2.27.1, 2.26.3, or 2.25.7 depending on your release line.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.9 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.44, the 98th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.