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TI-2023-21939 Aliases CVE-2023-41339GHSA-cqpc-x2c6-2gmf

Unsecured WMS dynamic styling sld=<url> parameter affords blind unauthenticated SSRF in GeoServer

Priority MEDIUM 44CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. The WMS specification defines an ``sld=<url>`` parameter for GetMap, GetLegendGraphic and GetFeatureInfo operations for user supplied "dynamic styling". Enabling the use of dynamic styles, without also configuring URL checks, provides the opportunity for Service Side Request Forgery. This vulnerability can be used to steal user NetNTLMv2 hashes which could be relayed or cracked externally to gain further access. This vulnerability has been patched in versions 2.22.5 and 2.23.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Fix Fixed geoserver (geoserver): 2.22.5, 2.23.2org.geoserver:gs-wms (Maven): 2.22.5, 2.23.2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
geoservergeoserverbefore 2.22.5; 2.23.0 to before 2.23.22.22.5, 2.23.2Patch availableCNA
—org.geoserver:gs-wms (Maven)before 2.22.52.22.5Patch availableGHSA-cqpc-x2c6-2gmf
—org.geoserver:gs-wms (Maven)2.23.0 to before 2.23.22.23.2Patch availableGHSA-cqpc-x2c6-2gmf
—org.geoserver.web:gs-web-app (Maven)before 2.22.52.22.5Patch availableGHSA-cqpc-x2c6-2gmf
—org.geoserver.web:gs-web-app (Maven)2.23.0 to before 2.23.22.23.2Patch availableGHSA-cqpc-x2c6-2gmf
  • geoserver Vendorgeoserver Affected before 2.22.5; 2.23.0 to before 2.23.2 Fixed in 2.22.5, 2.23.2 Patch available CNA
  • org.geoserver:gs-wms (Maven) Vendor— Affected before 2.22.5 Fixed in 2.22.5 Patch available GHSA-cqpc-x2c6-2gmf
  • org.geoserver:gs-wms (Maven) Vendor— Affected 2.23.0 to before 2.23.2 Fixed in 2.23.2 Patch available GHSA-cqpc-x2c6-2gmf
  • org.geoserver.web:gs-web-app (Maven) Vendor— Affected before 2.22.5 Fixed in 2.22.5 Patch available GHSA-cqpc-x2c6-2gmf
  • org.geoserver.web:gs-web-app (Maven) Vendor— Affected 2.23.0 to before 2.23.2 Fixed in 2.23.2 Patch available GHSA-cqpc-x2c6-2gmf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:osgeo:geoserver:*:*:*:*:*:*:*:*before 2.22.5; 2.23.0 to before 2.23.2VulnerableOSGeo
  • cpe:2.3:a:osgeo:geoserver:*:*:*:*:*:*:*:* Versions before 2.22.5; 2.23.0 to before 2.23.2 Vulnerable ·OSGeo

Remediation

  • Fix · CNA geoserver (geoserver) Fixed in 2.22.5, 2.23.2
  • Fix · GHSA-cqpc-x2c6-2gmf org.geoserver:gs-wms (Maven) Fixed in 2.22.5 Advisory →
  • Fix · GHSA-cqpc-x2c6-2gmf org.geoserver:gs-wms (Maven) Fixed in 2.23.2 Advisory →
  • Fix · GHSA-cqpc-x2c6-2gmf org.geoserver.web:gs-web-app (Maven) Fixed in 2.22.5 Advisory →
  • Fix · GHSA-cqpc-x2c6-2gmf org.geoserver.web:gs-web-app (Maven) Fixed in 2.23.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-41339
  2. 2026-10-03 Alias added: GHSA-cqpc-x2c6-2gmf
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 3

  • TI-2024-24187 Remote Code Execution (RCE) vulnerability in evaluating property name expressions in Geoserver KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36149 GeoServer is vulnerable to an Unauthenticated XML External Entities (XXE) attack via WMS GetMap feature KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-10619 Unfiltered SQL Injection Vulnerabilities in Geoserver CVSS 3.1CRITICAL 9.8
  • TI-2023-23486 WPS Server Side Request Forgery in GeoServer CVSS 3.1CRITICAL 9.8
  • TI-2023-17518 GeoServer 2, in some configurations, allows remote attackers to execute arbitrary code… CVSS 3.1CRITICAL 9.8
  • TI-2025-21556 GeoTools, GeoServer, and GeoNetwork XML External Entity (XXE) Processing Vulnerability in XSD schema handling CVSS 3.1CRITICAL 9.9
See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences