feat: Define option URI.AllowedSymbols#447
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Templates that are substituted after HTML Purifier constitute XSS risk. Compose your system in this way at your own risk.
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# [4.19.0](v4.18.0...v4.19.0) (2025-10-17) ### Bug Fixes * add warning for misleading option ([#433](#433)) ([b21a591](b21a591)) * catastrophic backtracking in Core.AggressivelyFixLt ([#440](#440)) ([418eeb7](418eeb7)) * Deprecated: preg_replace(): Passing null to parameter [#3](#3) ($subject) o… ([#421](#421)) ([5d154a2](5d154a2)) * non-substantive typos ([#434](#434)) ([c2bc354](c2bc354)) ### Features * Add CSS direction support ([#429](#429)) ([63e631e](63e631e)) * Add option for safe iframe hosts using array lookup ([#423](#423)) ([b5cbf0c](b5cbf0c)) * Allow more image widths by default ([#430](#430)) ([00a0748](00a0748)) * Define option URI.AllowedSymbols ([#447](#447)) ([77ebd08](77ebd08)) * PHP 8.4 support ([#441](#441)) ([ff005f6](ff005f6)) * Support PHP 8.5 versions ([#453](#453)) ([1eb05d9](1eb05d9))
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🎉 This PR is included in version 4.19.0 🎉 The release is available on GitHub release Your semantic-release bot 📦🚀 |
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When a user composes an HTML blob, they may include URLs. In some systems, URLs can have template expressions, such as:
The URL includes a subexpression delimited by
{}. Under pure URL rules, the{}should escaped. But if we're actually handling an URL-template, then the{}is meaningful (and distinct from%7Bor%7D).This adds an option
URI.AllowedSymbolswhich can be used to approve{}, as in: