Vulnerability · Published Nov 25, 2025 · Assigned by GitHub_M

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

Medium 6.1

In plain English

A medium-severity cross-site scripting in geoserver from geoserver. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 75.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.geoserver.web:gs-web-app	2.25.0	GHSA-w66h-j855-qr72
Maven	org.geoserver:gs-wms	2.25.0	GHSA-w66h-j855-qr72

Affected products (as reported)

Vendor	Product	Versions
geoserver	geoserver	< 2.25.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/geoserver/geoserver/security/advisories/GHSA-w66h-j855-qr72 x_refsource_CONFIRM
https://github.com/geoserver/geoserver/pull/7406 x_refsource_MISC
https://github.com/geoserver/geoserver/commit/dc9ff1c726dd73c884437a123b4ad72b19383c7d x_refsource_MISC
https://osgeo-org.atlassian.net/browse/GEOS-11297 x_refsource_MISC