CVE-2025-58360: OSGeo GeoServer Improper Restriction of XML External Entity Reference Vulnerability

In short

OSGeo GeoServer has a weakness classified as XML external entity reference (CWE-611). CISA added it to its Known Exploited Vulnerabilities catalog on 2025-12-11. NVD lists CVSS 3.1 at 9.8 CRITICAL.

What it is

“OSGeo GeoServer contains an improper restriction of XML external entity reference vulnerability that occurs when the application accepts XML input through a specific endpoint /geoserver/wms operation GetMap and could allow an attacker to define external entities within the XML request.” — CISA KEV, retrieved 2026-11-01

“GeoServer is an open source server that allows users to share and edit geospatial data. From version 2.26.0 to before 2.26.2 and before 2.25.6, an XML External Entity (XXE) vulnerability was identified. The application accepts XML input through a specific endpoint /geoserver/wms operation GetMap. However, this input is not sufficiently sanitized or restricted, allowing an attacker to define external entities within the XML request. This issue has been patched in GeoServer 2.25.6, GeoServer 2.26.3, and GeoServer 2.27.0.” — NVD, retrieved 2026-11-01

Who is affected

OSGeo GeoServer. NVD lists the following versions as affected:

• Versions before 2.25.6
• Versions from 2.26.0 inclusive, before 2.26.2

Exploitation status

CISA KEV added: 2025-12-11. Known ransomware campaign use: Not reported by CISA. Due date CISA set for US federal civilian agencies: 2026-01-01.

Scores

NVD CVSS 3.1: 9.8 CRITICAL; vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source [email protected].

EPSS by FIRST: 61.17%; percentile 99.16; score date 2026-10-31. EPSS estimates the probability of exploitation in the next 30 days.

CWE: CWE-611.

Timeline

CISA required action

“Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.” — CISA KEV

What to do

• Confirm whether you run OSGeo GeoServer and which version.
• Apply the vendor update or mitigation in the advisory.
• Follow CISA’s required action.
• Review the vendor guidance on signs of compromise.
• Track the fix through completion.

References

• Vendor Advisory: https://github.com/geoserver/geoserver/security/advisories/GHSA-fjf5-xgmq-5525
• NVD detail
• CVE.org record
• CISA KEV catalog

Sources and dates

CISA Known Exploited Vulnerabilities Catalog, version 2026.10.30; retrieved 2026-11-01. CISA KEV data: CC0 1.0. No endorsement by CISA.

NVD retrieved: 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

EPSS scores by FIRST; score date 2026-10-31.