GHSA-mxjf-hc9v-xgv2 ExtJS JavaScript framework used in TYPO3 vulnerable to Cross-site Scripting

Not scored Published

Attackers can exploit host header spoofing in TYPO3 to inject malicious scripts, potentially stealing user data or bypassing security controls.

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-mxjf-hc9v-xgv2?

GHSA-mxjf-hc9v-xgv2 is a cross-site scripting vulnerability in typo3/cms, published on 30 May 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

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.

Which versions are affected by GHSA-mxjf-hc9v-xgv2?

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

PackageAffectedFixed in
typo3/cms PackagistFrom 4.5.04.5.34
typo3/cms PackagistFrom 4.5.04.5.34
typo3/cms PackagistFrom 4.7.04.7.19
typo3/cms PackagistFrom 4.7.04.7.19
typo3/cms PackagistFrom 6.1.06.1.9
typo3/cms PackagistFrom 6.1.06.1.9
2 more packages
typo3/cms PackagistFrom 6.2.06.2.3
typo3/cms PackagistFrom 6.2.06.2.3

How do I fix GHSA-mxjf-hc9v-xgv2?

Upgrade typo3/cms to a fixed version for your release line: 4.5.34, 4.7.19, 6.1.9 or 6.2.3.

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-mxjf-hc9v-xgv2 being exploited?

There is no known exploitation of GHSA-mxjf-hc9v-xgv2 in the wild and no public exploit code.

Sources

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