CVE-2019-1273 Cross-site scripting in Windows

Medium 5.4 Published Updated

Attackers can execute arbitrary scripts in user browsers via unsanitized ADFS error messages, potentially leading to session hijacking or data theft.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2019-1273?

CVE-2019-1273 is a medium-severity cross-site scripting vulnerability in Microsoft Windows 10, published on 11 Sep 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A cross-site-scripting (XSS) vulnerability exists when Active Directory Federation Services (ADFS) does not properly sanitize certain error messages, aka 'Active Directory Federation Services XSS Vulnerability'.

Weakness: CWE-79

Which versions are affected by CVE-2019-1273?

It affects 3 products.

Products include Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019.

How do I fix CVE-2019-1273?

No fix has been published for CVE-2019-1273 yet. Limit exposure of the affected software until one is available.

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 CVE-2019-1273 being exploited?

There is no known exploitation of CVE-2019-1273 in the wild and no public exploit code.

All Microsoft Windows 10 vulnerabilities

Sources

Also known as GHSA-h8p6-mq4p-xf54.

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