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CVE-2018-6905

MediumPublished

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...

Published: Apr 8, 2018
Updated: Aug 5, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

4.8/ 10Medium

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

2.9%

Low · next 30 days

Percentile: 86.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2018-6905PoC
Step-by-step reproduction environment for CVE-2018-6905, a stored XSS vulnerability in TYPO3 install.php, with Docker setup and payload execution guide.
TYPO3-XSS-POCPoC
Typo3 -v9.1.0 Persistent Cross Site Scripting(XSS) Assigned CVE Number: CVE-2018-6905

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