In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and PendingBroadcast in gadgetchains/Laravel/RCE/3/chain.php in phpggc. The attacker must know the application key, which normally would never occur, but could happen if the attacker previously had privileged access or successfully accomplished a previous attack.
{
    "nvd_published_at": "2018-08-09T19:29:00Z",
    "github_reviewed_at": "2023-07-22T00:13:29Z",
    "cwe_ids": [
        "CWE-502"
    ],
    "severity": "HIGH",
    "github_reviewed": true
}