302 287
Advisory Published
CVE Published

CVE-2023-47127: Weak Authentication in Session Handling in typo3/cms-core

First published: Tue Nov 14 2023(Updated: )

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In typo3 installations there are always at least two different sites. Eg. and In affected versions a session cookie generated for the first site can be reused on the second site without requiring additional authentication. This vulnerability has been addressed in versions 8.7.55, 9.5.44, 10.4.41, 11.5.33, and 12.4.8. Users are advised to upgrade. There are no known workarounds for this vulnerability.

> ### CVSS: `CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:X/RL:O/RC:C` (4.0) ### Problem Given that there are at least two different sites in the same TYPO3 installation - for instance _first.example.org_ and _second.example.com_ - then a session cookie generated for the first site can be reused on the second site without requiring additional authentication. This vulnerability primarily affects the frontend of the website. It's important to note that exploiting this vulnerability requires a valid user account. ### Solution Update to TYPO3 versions 8.7.55 ELTS, 9.5.44 ELTS, 10.4.41 ELTS, 11.5.33, 12.4.8 that fix the problem described above. ### Credits Thanks to Rémy Daniel who reported this issue, and to TYPO3 core & security team member Benjamin Franzke who fixed the issue. ### References * [TYPO3-CORE-SA-2023-006](


Affected SoftwareAffected VersionHow to fix
Typo3 Typo3>=8.0.0<8.7.55
Typo3 Typo3>=9.0.0<9.5.44
Typo3 Typo3>=10.0.0<10.4.41
Typo3 Typo3>=11.0.0<11.5.33
Typo3 Typo3>=12.0.0<12.4.8

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Frequently Asked Questions

  • What is the severity of CVE-2023-47127?

    The severity of CVE-2023-47127 is medium.

  • How does weak authentication in session handling affect typo3/cms-core (CVE-2023-47127)?

    Weak authentication in session handling in typo3/cms-core (CVE-2023-47127) allows session cookies to be reused between different sites in the same TYPO3 installation.

  • How can I fix CVE-2023-47127?

    To fix CVE-2023-47127, update TYPO3 CMS Core to version 12.4.8, 11.5.33, 10.4.41, 9.5.44, or 8.7.55 depending on the installed version.

  • Where can I find more information about CVE-2023-47127?

    More information about CVE-2023-47127 can be found in the following references: [GitHub Advisory](, [GitHub Commit](, [TYPO3 Security Advisory](

  • What are the Common Weakness Enumeration (CWE) IDs associated with CVE-2023-47127?

    The Common Weakness Enumeration (CWE) IDs associated with CVE-2023-47127 are CWE-294 and CWE-302.


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