GHSA-mxjf-hc9v-xgv2

ExtJS JavaScript framework used in TYPO3 vulnerable to Cross-site Scripting

6.1 MediumFix available

Failing to properly validate the HTTP host-header TYPO3 CMS is susceptible to host spoofing. TYPO3 uses the HTTP host-header to generate absolute URLs in several places like 404 handling, http(s) enforcement, password reset links and many more. Since the host header itself is provided by the client it can be forged to any value, even in a name based virtual hosts environment. A blog post describes this problem in great detail.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

What each source reports

GitHub Advisories Score used6.1

ExtJS JavaScript framework used in TYPO3 vulnerable to Cross-site Scripting

Record: GHSA-mxjf-hc9v-xgv2
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV6.1

ExtJS JavaScript framework used in TYPO3 vulnerable to Cross-site Scripting

Record: GHSA-mxjf-hc9v-xgv2
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected packages

Affected packages
Package	Affected	Fixed
`typo3/cms` Packagist	6.2.0 up to 6.2.3	6.2.3
`typo3/cms` Packagist	6.1.0 up to 6.1.9	6.1.9
`typo3/cms` Packagist	4.7.0 up to 4.7.19	4.7.19
`typo3/cms` Packagist	4.5.0 up to 4.5.34	4.5.34
`typo3/cms` Packagist	6.2.0 up to 6.2.3, plus listed versions 6.2.16.2.2	6.2.3

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	GitHub Advisories, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

GHSA-mxjf-hc9v-xgv2 is a medium vulnerability (CVSS 6.1) in typo3/cms, published May 30, 2024. No source lists public exploit code. Fixed in typo3/cms 6.2.3.