CVE-2025-21621

Name: CVE-2025-21621
Creator: NVD / NIST
Published: 2025-11-25T22:15:47.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2025-21621 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.25%

16.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Geoserver	Geoserver	< 2.25.0

References

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

Timeline

Published: Nov 25, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-21621?

How severe is CVE-2025-21621?

CVE-2025-21621 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2025-21621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-21621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST