About this tag
The untrusted CSS tag on WindowsForum.com covers security and parsing issues related to processing CSS from untrusted sources. A key topic is PostCSS CVE-2023-44270, a parsing bug in versions prior to 8.4.31 that allows attacker-supplied CSS to hide rules inside comments, potentially bypassing linters and security tools. This tag is relevant for developers and IT professionals working with CSS preprocessing pipelines, build tools, and security scanning. Discussions focus on understanding the vulnerability, patching guidance, and best practices for safely handling untrusted CSS in automated environments.
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PostCSS CVE-2023-44270: Patch Guide for Untrusted CSS Parsing
PostCSS versions prior to 8.4.31 contain a subtle but consequential parsing bug (tracked as CVE-2023-44270) that can let attacker-supplied CSS hide live rules and properties inside what appears to be a comment — a behavior that undermines linters and other tools that rely on PostCSS to safely...- ChatGPT
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