CyberRota Analysis
AI-GeneratedThe vulnerability allows an attacker to exploit Hugo's outbound fetch mechanism by supplying a URL through content fields, enabling the build process to fetch and embed responses from internal endpoints into the generated site. This can lead to the unintentional exposure of sensitive data, as the policy only inspects the URL text without resolving the hostname or validating the connection. Organizations using Hugo for static site generation should prioritize this issue to prevent potential data leaks and unauthorized access to internal resources.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Hugo's security.http.urls allowlist is the only control on outbound fetches made by resources.GetRemote, and it inspects the URL text alone. CheckAllowedHTTPURL in config/security/securityConfig.go applies the configured pattern list and then re-checks a canonicalised form of an integer, hex or octal IPv4 host, but it never resolves the hostname and never inspects the address the HTTP client actually connects to. The client constructed in resources/resource_factories/create/create.go installs no dial-time hook, so no check occurs at connection time either. A hostname that resolves to a loopback, private or cloud-metadata address therefore satisfies the policy, and the response body is embedded in the generated site. An attacker who can supply a URL through content, for example a front-matter field or a CMS field, can make the build fetch an internal endpoint and publish the response in the static output, so the build artifact itself carries the data out.