CyberRota Analysis
AI-GeneratedWeasyPrint versions prior to 70.0 are vulnerable to a bypass of configured restrictions in server-side applications, allowing attackers to manipulate inputs to the HTML.write_pdf() function. This can lead to unauthorized access to local files, which may be embedded in generated PDF documents, potentially exposing sensitive information. Organizations using WeasyPrint for PDF generation should prioritize upgrading to version 70.0 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0.