CVE-2024-23818: GeoServer Stored Cross-Site Scripting (XSS) vulnerability in WMS OpenLayers Format

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-20 · updated 2026-06-17
Weakness: CWE-79

Description

GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 2.23.3 and 2.24.1 that enables an authenticated administrator with workspace-level privileges to store a JavaScript payload in the GeoServer catalog that will execute in the context of another user's browser when viewed in the WMS GetMap OpenLayers Output Format. Access to the WMS OpenLayers Format is available to all users by default although data and service security may limit users' ability to trigger the XSS. Versions 2.23.3 and 2.24.1 contain a patch for this issue.

Affected products

geoserver: before 2.23.3; 2.24.0 — fixed in 2.23.3

How to fix

Upgrade to a fixed version: geoserver 2.23.3. Check the vendor advisory for mitigations.

References

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