Affected versions

Symfony versions <5.4.46; >=6, <6.4.14; >=7, <7.1.7 of the Symfony HttpFoundation component are affected by this security issue.

The issue has been fixed in Symfony 5.4.46, 6.4.14, and 7.1.7.

Description

The Request class, does not parse URI with special characters the same way browsers do. As a result, an attacker can trick a validator relying on the Request class to redirect users to another domain.

Resolution

The Request::create methods now assert the URI does not contain invalid characters as defined by https://url.spec.whatwg.org/

The patch for this issue is available here for branch 5.4.

Credits

We would like to thank Sam Mush for reporting the issue and Nicolas Grekas for providing the fix.

Symfony Blog

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