CVE-2019-12823 Craft CMS XSS Vulnerability
An attacker can inject malicious scripts via XML feeds in Craft CMS, potentially executing code in user browsers.
- 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-2019-12823?
CVE-2019-12823 is a medium-severity cross-site scripting vulnerability in Craftcms Craft Cms, published on 18 Jun 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
Craft CMS before 3.1.31 does not properly filter XML feeds and thus allowing XSS.
Weakness: CWE-79
Which versions are affected by CVE-2019-12823?
2 open source packages ship an affected version, including craftcms/cms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | All versions | 3.1.31 |
craftcms/cms Packagist | All versions | 3.1.31 |
Products include Craftcms Craft Cms.
How do I fix CVE-2019-12823?
Upgrade craftcms/cms to 3.1.31 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-2019-12823 being exploited?
There is no known exploitation of CVE-2019-12823 in the wild and no public exploit code.
Other vulnerabilities in Craftcms Craft Cms
Sources
Also known as GHSA-w5q4-q7wp-qww6.