CVE-2023-47127: TYPO3

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

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. first.example.org and second.example.com. 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.

Affected products

• TYPO3 TYPO3: from 8.0.0, before 8.7.55 (fixed in 8.7.55); from 9.0.0, before 9.5.44 (fixed in 9.5.44); from 10.0.0, before 10.4.41 (fixed in 10.4.41); from 11.0.0, before 11.5.33 (fixed in 11.5.33); from 12.0.0, before 12.4.8 (fixed in 12.4.8)

Published 2023-11-14. Last modified 2026-06-17.