GHSA-qmwf-j7g7-f5jw Cross-Site Scripting in third party library mso/idna-convert

Not scored Published

Attackers can exploit XSS if the vendor directory is exposed in the web root, requiring configuration changes to secure the installation.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is GHSA-qmwf-j7g7-f5jw?

GHSA-qmwf-j7g7-f5jw is a cross-site scripting vulnerability in typo3/cms, published on 5 Jun 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Make sure to not expose the vendor directory to the publicly accessible document root. In composer managed installation, make sure to configure a dedicated web folder. In general it is recommended to not expose the complete typo3_src sources folder in the document root.

Which versions are affected by GHSA-qmwf-j7g7-f5jw?

4 open source packages ship an affected version, including typo3/cms.

PackageAffectedFixed in
typo3/cms PackagistFrom 7.6.07.6.10
typo3/cms PackagistFrom 7.6.07.6.10
typo3/cms PackagistFrom 8.0.08.2.1
typo3/cms PackagistFrom 8.0.08.2.1

How do I fix GHSA-qmwf-j7g7-f5jw?

Upgrade typo3/cms to a fixed version for your release line: 7.6.10 or 8.2.1.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is GHSA-qmwf-j7g7-f5jw being exploited?

There is no known exploitation of GHSA-qmwf-j7g7-f5jw in the wild and no public exploit code.

Sources

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