Description
GeoServer is an open source server that allows users to share and edit geospatial data. Prior to versions 2.26.4 and 2.27.3, a GeoServer that uses `ENTITY_RESOLUTION_ALLOWLIST` may allow attacker to perform unauthenticated Server-Side Request Forgery (SSRF). This vulnerability requires that GeoServer is set up to use a proxy base URL and the `ENTITY_RESOLUTION_ALLOWLIST` (default since 2.25.0). Versions 2.26.4 and 2.27.3 contain a fix. GeoServer installations are only affected by this vulnerability if they use a proxy base URL that does not contain a URL path or end with a slash. If the proxy base URL does not contain a path, adding a slash to the end of the URL will mitigate this vulnerability.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
Low
Affected products
- geoserver / org.geoserver:gs-main< 2.26.4 – < 2.26.4
- geoserver / org.geoserver:gs-main>= 2.27.0, < 2.27.3 – >= 2.27.0, < 2.27.3
- geoserver / org.geoserver.web:gs-web-app< 2.26.4 – < 2.26.4
- geoserver / org.geoserver.web:gs-web-app>= 2.27.0, < 2.27.3 – >= 2.27.0, < 2.27.3