postcss: PostCSS: Information disclosure and denial of service via crafted CSS input

A flaw was found in PostCSS, a tool that processes CSS files. An attacker who provides specially crafted CSS input containing a malicious source map comment can cause the system to read arbitrary files from the local filesystem. This can lead to the disclosure of sensitive information, specifical...

CVE-2026-45623

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. In versions 8.5.11 and prior, the PreviousMap parses the / sourceMappingURL=PATH / comment from any CSS string passed to process and dereferences PATH against the...

CVE-2025-5699

CVE-2025-5699 involves the Developer Formatter WordPress plugin. A stored cross-site scripting (XSS) flaw exists in Custom CSS handling across all versions up to 2015.0.2.1, caused by insufficient input sanitization and output escaping. Exploitation requires authenticated admin-level access and c...