Medium 6.1Published Nov 25, 2025

CVE-2025-21621GeoServer Reflected Cross-Site Scripting (XSS) vulnerability in WMS GetFeatureInfo HTML format

Updated under an hour ago (Oct 30, 2026, 5:50 AM ET)

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It affects geoserver. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Nov 26, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

geoserver geoserver geoserver:geoserver (from the name)	before 2.25.0	CNA record
geoserver geoserver geoserver:geoserver	before 2.25.0	NVD

References

References

https://github.com/geoserver/geoserver/security/advisories/GHSA-w66h-j855-qr72	x-refsource-confirm, vendor-advisory
https://github.com/geoserver/geoserver/pull/7406	x-refsource-misc, issue-tracking
https://github.com/geoserver/geoserver/commit/dc9ff1c726dd73c884437a123b4ad72b19383c7d	x-refsource-misc, patch
https://osgeo-org.atlassian.net/browse/GEOS-11297	x-refsource-misc, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.