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HIGH severity

CVE-2023-43795 — gs-wps-core

HIGH

CVE-2023-43795 is a high-severity (CVSS 8.6) Server-Side Request Forgery (SSRF) vulnerability in org.geoserver.extension:gs-wps-core. EPSS puts its 30-day exploitation probability at 69.0% (99th percentile). A fix is available for org.geoserver.extension:gs-wps-core — see the affected versions and patch details below.

WPS Server Side Request Forgery in GeoServer

Also known asGHSA-5pr3-m5hm-9956
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-43795.

EPSS Exploitation Probability

via FIRST.org ↗
69.0%probability of exploitation in next 30 days
High Risk0.00%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
61.2%72.8%84.4%96.0%89.5%69.0%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.geoserver.extension:gs-wps-core☕org.geoserver.extension:gs-wps-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Summary

The OGC Web Processing Service (WPS) specification is designed to process information from any server using GET and POST requests.

This presents the opportunity for Server Side Request Forgery.

Details

This vulnerability requires:

  • The WPS extension to be installed
  • The WPS security setting "Disable complex inputs" to be unselected
  • Security URL checks to be disabled

Impact

This vulnerability presents the opportunity for Server Side Request Forgery.

Mitigation

The ability to reference an external URL location is defined by the WPS standard Execute operation. This operations is defined by an Industry and International standard and cannot be redefined by the GeoServer application in isolation.

To disable complex remote inputs on GeoServer 2.20.5 and GeoServer 2.21.0:

  1. Navigate to Security > WPS Security page
  2. Locate Complex Inputs heading
  3. Select the check box for Disable loading complex inputs from remote references

Resolution

To allow processing of complex inputs safely in GeoServer 2.22.5 and GeoServer 2.23.2:

  1. Navigate to Security > URL Checks
  2. Enable URL Checks are enabled setting
  3. Check the user manual for examples of how to trust specific locations for your external services.

Processing of complex inputs safely is on by default in GeoServer 2.24.0.

References

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.geoserver.extension:gs-wps-coreall versions2.22.5org.geoserver.extension:gs-wps-core:2.22.5
☕Mavenorg.geoserver.extension:gs-wps-core≥ 2.23.0&&< 2.23.22.23.2org.geoserver.extension:gs-wps-core:2.23.2

Affected Products

1 product · 2 configurations
Application
geoserverosgeo
≥ 2.23.0 && < 2.23.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.geoserver.extension:gs-wps-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.geoserver.extension:gs-wps-core to 2.22.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-43795 is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

How to detect CVE-2023-43795

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2023-43795 -u https://target
Template
GeoServer WPS - Server Side Request Forgery
Severity
critical
Impact
Unauthenticated attackers can exploit SSRF through the WPS service to make arbitrary HTTP requests and access internal network resources, potentially compromising the entire GeoServer infrastructure and accessing sensitive geospatial data.
Remediation
Update GeoServer to version 2.22.5 or 2.23.2 or later that validates URLs in WPS requests and restricts access to authorized external resources only.

Template by ProjectDiscovery nuclei-templates (DhiyaneshDK), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

### Summary The OGC Web Processing Service (WPS) specification is designed to process information from any server using GET and POST requests. This presents the opportunity for Server Side Request Forgery. ## Details This vulnerability requires: * The WPS extension to be installed * The WPS security setting "Disable complex inputs" to be unselected * Security URL checks to be disabled ### Impact This vulnerability presents the opportunity for Server Side Request Forgery. ### Mitigation The ability to reference an external URL location is defined by the WPS standard Execute operation.
O3 Security · Impact-Aware SCA

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CVE-2023-43795: gs-wps-core SSRF — Fixed in 2.22.5