CyberRota Analysis
AI-GeneratedThe get-html-skeleton tool is vulnerable due to inadequate validation of URLs, allowing attackers to exploit this weakness by supplying malicious URLs that can access sensitive data, such as instance credentials, from the host environment. This vulnerability poses a high risk, particularly to organizations using the affected tool in their MCP servers, as it could lead to unauthorized data exposure. Users of the tool should prioritize immediate remediation by upgrading to version 0.9.12, which removes the vulnerable functionality.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
The get-html-skeleton tool fetched a URL the caller supplied after checking only its syntax. The handler in src/tools/common/get_html_skeleton.ts validated the url argument with isValidHttpUrl from src/utils/generic.ts, which confirmed the string began with an http or https scheme and parsed as a URL and inspected neither the host name nor the address it resolves to. Loopback, link-local and private ranges therefore passed, including the address cloud providers use to serve instance metadata. The unchecked URL was handed to the web-browser actor and the fetched document was returned in the tool response, so any caller of the MCP server could make it request an endpoint reachable only from the host and read the result, including instance credentials. Version 0.9.12 removes the tool.