Home/CVE/GeoServer is an open source server that allows users to share and edit geospatial data. Prior to version 2.25.0, a refle
CVE

CVE-2025-21621

GeoServer is an open source server that allows users to share and edit geospatial data. Prior to version 2.25.0, a refle

GeoServer is an open source server that allows users to share and edit geospatial data. Prior to version 2.25.0, a reflected cross-site scripting (XSS) vulnerability exists in the WMS GetFeatureInfo HTML output format that enables a remote attacker to execute arbitrary JavaScript code in a victim's browser through specially crafted SLD_BODY parameters. This issue has been patched in version 2.25.0.

MEDIUM · CVSS 6.1 EPSS 0.00035
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
geoserver< 2.25.0
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.geoserver.web:gs-web-app MODERATE fixed in 2.25.0
Maven org.geoserver:gs-wms MODERATE fixed in 2.25.0
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Nov 2025 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/geoserver/geoserver/commit/dc9ff1c726dd73c884437a123b4ad72b19383c7dPatch
https://github.com/geoserver/geoserver/pull/7406Issue Tracking
https://github.com/geoserver/geoserver/security/advisories/GHSA-w66h-j855-qr72Vendor Advisory
https://osgeo-org.atlassian.net/browse/GEOS-11297Issue Tracking
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