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Date: September 13, 2022

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. Users are advised to update to TYPO3 version 11.5.16 to resolve this issue. There are no known workarounds for this issue.

Language: PHP

Severity Score

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling


Top Fix


Upgrade Version

Upgrade to version v11.5.16

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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