CVE-2019-16126 Cross-site Scripting in Grav

Medium 6.1 Published 9 Sep 2019 Updated 5 Aug 2024

Attackers can execute arbitrary JavaScript in victims' browsers via stored XSS in SVG images, potentially leading to session hijacking or data theft.

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 CVE-2019-16126?

CVE-2019-16126 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Sep 2019. 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

Grav through 1.6.15 allows (Stored) Cross-Site Scripting due to JavaScript execution in SVG images.

Weakness: CWE-79

Which versions are affected by CVE-2019-16126?

2 open source packages ship an affected version, including getgrav/grav. It affects 1 product.

Package	Affected	Fixed in
`getgrav/grav` Packagist	All versions	`1.7.0-beta.8`
`getgrav/grav` Packagist	All versions	`1.7.0-beta.8`

Products include Getgrav Grav Cms.

How do I fix CVE-2019-16126?

Upgrade getgrav/grav to 1.7.0-beta.8 or later.

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-2019-16126 being exploited?

There is no known exploitation of CVE-2019-16126 in the wild and no public exploit code.

Sources

Also known as GHSA-6268-v434-45m5.