CVE-2018-5233 Grav CMS Cross-site scripting (XSS) vulnerability
Remote attackers can inject arbitrary web script or HTML via PATH_INFO in Grav CMS admin tools, potentially compromising user sessions.
- 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-2018-5233?
CVE-2018-5233 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Mar 2018. 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
Cross-site scripting (XSS) vulnerability in system/src/Grav/Common/Twig/Twig.php in Grav CMS before 1.3.0 allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to admin/tools.
Weakness: CWE-79
Which versions are affected by CVE-2018-5233?
2 open source packages ship an affected version, including getgrav/grav. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
getgrav/grav Packagist | All versions | 1.3.0 |
getgrav/grav Packagist | All versions | 1.3.0 |
Products include Getgrav Grav Cms.
How do I fix CVE-2018-5233?
Upgrade getgrav/grav to 1.3.0 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-2018-5233 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-5233 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in n/a
Sources
Also known as GHSA-977g-93f5-rqjx.