Winter: Local File Inclusion through @import directives in LESS compilation of backend customizable stylesheets and theme assets

Impact Affected versions of Winter CMS allow authenticated backend users with the following permissions to disclose arbitrary files readable by the PHP process by injecting @import inline "" directives into LESS source that the backend compiles. Four entry points share the same root cause: - Bran...

PT-2026-37157

Name of the Vulnerable Software and Affected Versions Flarum versions prior to 1.8.16 Flarum versions prior to 2.0.0-rc.1 Description An authenticated administrator can inject an arbitrary @import directive into the compiled forum.css file. This occurs because settings registered as LESS config...

CVE-2026-40301

Summary of CVE-2026-40301 : The PHP library rhukster/dom-sanitizer (and related advisories) contains a flaw prior to version 1.0.10 where DOMSanitizer::sanitize() does not inspect the text content of elements inside SVG. As a result, CSS rules using url() and @import can reference attacker-contr...

CVE-2005-4089

Microsoft Internet Explorer allows remote attackers to bypass cross-domain security restrictions and obtain sensitive information by using the @import directive to download files from other domains that are not valid Cascading Style Sheets CSS files, as demonstrated using Google Desktop, aka...

CVE-2005-4089

Microsoft Internet Explorer allows remote attackers to bypass cross-domain security restrictions and obtain sensitive information by using the @import directive to download files from other domains that are not valid Cascading Style Sheets CSS files, as demonstrated using Google Desktop, aka...