CVE-2018-6905

Severity: medium (CVSS 4.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-04-08 · updated 2026-06-17
Weakness: CWE-79

Description

The page module in TYPO3 before 8.7.11, and 9.1.0, has XSS via $GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'], as demonstrated by an admin entering a crafted site name during the installation process.

Affected products

typo3: before 8.7.11; from 9.0.0 before 9.1.0 — fixed in 8.7.11, 9.1.0

How to fix

Upgrade to a fixed version: typo3 8.7.11, 9.1.0. Check the vendor advisory for mitigations.

References

http://www.securitytracker.com/id/1040755
https://forge.typo3.org/issues/84191
https://github.com/pradeepjairamani/TYPO3-XSS-POC
http://www.securitytracker.com/id/1040755
https://forge.typo3.org/issues/84191
https://github.com/pradeepjairamani/TYPO3-XSS-POC

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