Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks and Unicode Whitespace Bypass Visual-Spoofing Defense

Description Symfony\Component\HtmlSanitizer\TextSanitizer\UrlSanitizer::parse rejects URLs containing raw Unicode explicit-direction BiDi formatting characters U+202A–U+202E, U+2066–U+2069 as a defense against visual-spoofing of the rendered href. The check covers only the raw UTF-8 forms of thos...

GHSA-V3WM-QF9P-C549 Symfony: HtmlSanitizer URL Parser Deny Gates Underinclusive: Percent-Encoded BiDi Marks and Unicode Whitespace Bypass Visual-Spoofing Defense

Description Symfony\Component\HtmlSanitizer\TextSanitizer\UrlSanitizer::parse rejects URLs containing raw Unicode explicit-direction BiDi formatting characters U+202A–U+202E, U+2066–U+2069 as a defense against visual-spoofing of the rendered href. The check covers only the raw UTF-8 forms of thos...