CISA KEV · Known exploitedCritical

CVE-2025-58360

OSGeo GeoServer

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.

CVSS: 9.8
EPSS: 64.9%
CISA KEV: Listed
Published: 2025.11.26

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability64.9%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: OSGeo GeoServer
Affected versions: >= 2.26.0, < 2.26.2, < 2.25.6, >= 2.26.0 < 2.26.2
Fixed versions: 2.25.6, 2.26.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

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.

Due date: 2026.01.01

1
Identify
Confirm that OSGeo GeoServer and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-611
KEV added: 2025.12.11
Ransomware use: 미확인