CVE-2025-58175: GeoServer has a Server-Side Request Forgery (SSRF) Vulnerability in its XML Entity Resolution
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.
Security readout for executives and security teams
Plain-English summary
CVE-2025-58175 is a GeoServer SSRF flaw in XML entity resolution. In specific configurations, an unauthenticated attacker could make the server send requests to unintended locations. The issue is fixed in GeoServer 2.26.4 and 2.27.3. Exposure depends on proxy base URL formatting and ENTITY_RESOLUTION_ALLOWLIST use.
Executive priority
Treat as a timely remediation item for exposed GeoServer systems, especially internet-facing services. It is not currently supported by supplied evidence as a known exploited emergency, but SSRF can expose internal services or sensitive responses if conditions are met.
Technical view
Before GeoServer 2.26.4 and 2.27.3, XML entity resolution with ENTITY_RESOLUTION_ALLOWLIST can permit unauthenticated SSRF. The vulnerable condition requires a configured proxy base URL and the allowlist. Installations are affected only when the proxy base URL has no URL path and does not end with a slash. CVSS is 6.5, with high confidentiality impact and high attack complexity.
Likely exposure
GeoServer deployments before 2.26.4, or 2.27.0 through 2.27.2, may be exposed only if they use ENTITY_RESOLUTION_ALLOWLIST and a proxy base URL lacking both a path and trailing slash. The source says this allowlist is default since 2.25.0.
Exploitation context
The vulnerability is network-reachable and unauthenticated, but the CVSS vector rates attack complexity as high. The provided sources do not report active exploitation, and the CVE is not listed as KEV in the supplied data.
Researcher notes
Key validation hinges on configuration, not version alone. Focus on proxy base URL parsing behavior, ENTITY_RESOLUTION_ALLOWLIST use, and affected version ranges. Avoid assuming all GeoServer deployments are vulnerable. Public sources identify fixed versions and a specific trailing-slash mitigation for pathless proxy base URLs.
Mitigation direction
Upgrade GeoServer to 2.26.4 or 2.27.3.
If not upgrading immediately, add a trailing slash to pathless proxy base URLs.
Review the GeoServer advisory for configuration-specific guidance.
Prioritize externally reachable GeoServer instances using proxy base URLs.
Validation and detection
Inventory GeoServer versions across production and staging.
Check whether ENTITY_RESOLUTION_ALLOWLIST is enabled or defaulted.
Review proxy base URL values for missing path and trailing slash.
Confirm upgraded instances report 2.26.4, 2.27.3, or later.
Document any temporary trailing-slash mitigation applied.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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CWE-20: Exact CWE lookup
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Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
CWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
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