CyberRota Analysis
AI-GeneratedThe vulnerability allows attackers to exploit the PostCSS library by manipulating sourceMappingURL values, potentially disclosing sensitive content from arbitrary .map files when untrusted CSS is processed. This could lead to exposure of confidential information, making it critical for developers using versions prior to 8.5.18 to prioritize upgrading to the patched version. Organizations relying on PostCSS for CSS processing should assess their risk and take immediate action to mitigate this high-severity issue.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.18, lib/previous-map.js loadMap() passes attacker-controlled sourceMappingURL values to join(dirname(opts.from), annotation), and loadFile() permits traversed or absolute .map paths, allowing untrusted CSS processed without map: false to disclose sourcesContent from arbitrary reachable .map files through result.map. This issue is fixed in version 8.5.18.