- Component Type: TYPO3 CMS
- Subcomponent: Session Handling (ext:core)
- Release Date: November 14, 2023
- Vulnerability Type: Information Disclosure
- Affected Versions: 8.0.0-8.7.54, 9.0.0-9.5.43, 10.0.0-10.4.40, 11.0.0-11.5.32, 12.0.0-12.4.7
- Severity: Medium
- Suggested 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
- References: CVE-2023-47127, CWE-302, CWE-1390
Problem Description
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.
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.