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TYPO3-CORE-SA-2019-009: Information Disclosure in Page Tree

Categories: Development Created by Oliver Hader
It has been discovered, that TYPO3 CMS is susceptible to information disclosure.
  • Component Type: TYPO3 CMS
  • Vulnerable subcomponent: Page Tree (ext:backend)
  • Release Date: May 7, 2019
  • Vulnerability Type: Information Disclosure
  • Affected Versions: 9.0.0-9.5.5
  • Severity: Medium
  • Suggested CVSS v3.0: AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C
  • CVE: not assigned yet

Problem Description

It has been discovered backend users not having read access to specific pages still could see them in the page tree which actually should be disallowed. A valid backend user account is needed in order to exploit this vulnerability.

Solution

Update to TYPO3 version 9.5.6 that fixes the problem described.

Credits

Thanks to various contributors who reported this issue.

General Advice

Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.

General Note

All security related code changes are tagged so that you can easily look them up in our review system.