Headline
CVE-2023-46734: Potential XSS vulnerabilities in CodeExtension filters
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in versions 2.0.0, 5.0.0, and 6.0.0 and prior to versions 4.4.51, 5.4.31, and 6.3.8, some Twig filters in CodeExtension use is_safe=html but don’t actually ensure their input is safe. As of versions 4.4.51, 5.4.31, and 6.3.8, Symfony now escapes the output of the affected filters.
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Package
composer symfony/symfony (Composer)
Affected versions
>=2.0.0,<4.4.51
>=5.0.0,<5.4.31
>=6.0.0,<6.3.8
Patched versions
4.4.51
5.4.31
4.4.51
>=2.0.0,<4.4.51
>=5.0.0,<5.4.31
>=6.0.0,<6.3.8
Description
Description
Some Twig filters in CodeExtension use “is_safe=html” but don’t actually ensure their input is safe.
Resolution
Symfony now escapes the output of the affected filters.
The patch for this issue is available here for branch 4.4.
Credits
We would like to thank Pierre Rudloff for reporting the issue and to Nicolas Grekas for providing the fix.
Related news
### Description Some Twig filters in CodeExtension use "is_safe=html" but don't actually ensure their input is safe. ### Resolution Symfony now escapes the output of the affected filters. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/9da9a145ce57e4585031ad4bee37c497353eec7c) for branch 4.4. ### Credits We would like to thank Pierre Rudloff for reporting the issue and to Nicolas Grekas for providing the fix.