XSS in Geoserver
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 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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Geoserver — versions < 2.25.0
Weakness classification (CWE)
References
- github.com/geoserver/geoserver/security/advisories/GHSA-w66h-j855-qr72 (Vendor Advisory)
- github.com/geoserver/geoserver/pull/7406 (Issue Tracking)
- github.com/geoserver/geoserver/commit/dc9ff1c726dd73c884437a123b4ad72b19383c7d (Patch)
- osgeo-org.atlassian.net/browse/GEOS-11297 (Issue Tracking)
Frequently asked questions
- What is CVE-2025-21621?
- CVE-2025-21621 is a medium-severity vulnerability in Geoserver, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-11-25.
- How severe is CVE-2025-21621?
- Medium severity. CVSS v3 base score is 6.1 out of 10.