On the Symfony 2.0.x version, there's a security issue that allows access to routes protected by a firewall even when the user is not logged in.
Both the Routing component and the Security component uses the path returned by getPathInfo() to match a Request. The getPathInfo() returns a decoded path, but the Routing component (Symfony\Component\Routing\Matcher\UrlMatcher) decodes the path a second time; whereas the Security component, Symfony\Component\HttpFoundation\RequestMatcher, does not.
This difference causes Symfony 2.0 to be vulnerable to double encoding attacks.
{
    "nvd_published_at": "2012-12-27T11:47:00Z",
    "severity": "MODERATE",
    "github_reviewed_at": "2023-08-15T23:43:25Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-287"
    ]
}