How severe is CVE-2025-30220?

CVE-2025-30220 has a CVSS score of 9.9/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-30220?

CVE-2025-30220 affects the following packages: org.geoserver.web:gs-web-app (Maven), org.geoserver:gs-wfs (Maven), org.geoserver.web:gs-web-app (Maven), org.geoserver:gs-wfs (Maven), org.geoserver.web:gs-web-app (Maven), org.geoserver:gs-wfs (Maven). Ecosystems affected: Maven.

How do I fix CVE-2025-30220?

Update org.geoserver.web:gs-web-app to 2.27.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-30220 is resolved across your whole dependency graph.

How do I detect CVE-2025-30220 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.geoserver.web:gs-web-app. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate CVE-2025-30220 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2025-30220?

O3 pinpoints whether CVE-2025-30220 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is CVE-2025-30220 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-30220 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-30220?

CVE-2025-30220 has an EPSS (Exploit Prediction Scoring System) score of 49.2%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

What type of vulnerability is CVE-2025-30220?

CVE-2025-30220 is classified as XML External Entity (XXE) (CWE-611), Server-Side Request Forgery (SSRF) (CWE-918). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for CVE-2025-30220?

A Nuclei detection template exists for CVE-2025-30220, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2025-30220 published, and has it been updated?

CVE-2025-30220 was published on June 10, 2025 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2025-30220: gs-web-app XML External Entity (XXE) (Critical…

EPSS Exploitation Probability

via FIRST.org ↗

49.2%probability of exploitation in next 30 days

High Risk99th percentile+35.23%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

6 pkgs affected

☕org.geoserver.web:gs-web-app☕org.geoserver:gs-wfs☕org.geoserver.web:gs-web-app☕org.geoserver:gs-wfs☕org.geoserver.web:gs-web-app☕org.geoserver:gs-wfs

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

6 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.geoserver.web:gs-web-app`	≥ 2.27.0&&< 2.27.1	2.27.1
☕Maven	`org.geoserver:gs-wfs`	≥ 2.27.0&&< 2.27.1	2.27.1
☕Maven	`org.geoserver.web:gs-web-app`	≥ 2.26.0&&< 2.26.3	2.26.3
☕Maven	`org.geoserver:gs-wfs`	≥ 2.26.0&&< 2.26.3	2.26.3
☕Maven	`org.geoserver.web:gs-web-app`	all versions	2.25.7
☕Maven	`org.geoserver:gs-wfs`	all versions	2.25.7

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.geoserver.web:gs-web-app. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.geoserver.web:gs-web-app to 2.27.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-30220 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2025-30220 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2025-30220. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

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

O3 Security · Impact-Aware SCA

Is CVE-2025-30220 in your dependencies?

O3 detects CVE-2025-30220 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works

CVE-2025-30220