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Improper Authentication


Severity Medium
Score 6.5/10


TYPO3 is an open source PHP based web content management system. In versions 10.2.0 prior to 10.4.33, 11.x prior to 11.5.20, 12.x prior to 12.1.1 typo3/cms-core, typo3/cms, typo3/cms-felogin and typo3/cms-frontend are vulnerable to Improper Authentication. Restricting frontend login to specific users, organized in different storage folders (partitions), can be bypassed. A potential attacker might use this ambiguity in usernames to get access to a different account - however, credentials must be known to the adversary.

  • LOW
  • NONE
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  • LOW
  • HIGH
  • NONE

CWE-287 - Improper Authentication

Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.

Advisory Timeline

  • Published