CyberRota Analysis
AI-GeneratedThe vulnerability affects the Mistune Markdown parser in versions prior to 3.3.0, where the safe_url filter inadequately restricts certain URL schemes, allowing potentially malicious schemes to be rendered in href and src attributes. This could lead to script execution in affected user agents, posing a risk to users interacting with rendered content. Organizations using Mistune for Markdown processing should prioritize upgrading to version 3.3.0 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
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the safe_url filter in src/mistune/renderers/html.py blocks only javascript:, vbscript:, file:, and data: schemes, allowing legacy or chained schemes such as feed:, view-source:, jar:, livescript:, mocha:, ms-its:, mk:, and res: to reach rendered href and src attributes and potentially execute script in affected user agents. This issue is fixed in version 3.3.0.
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