Cross-site scripting in Grav CMS - #VU130046
Published: December 10, 2020 / Updated: May 5, 2026
Vulnerability identifier: #VU130046
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Grav CMS
Grav CMS
Software vendor:
Grav CMS
Grav CMS
Description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to cross-site scripting in the Admin plugin page editor when editing pages with the default security configuration. A remote user can inject a crafted script to execute arbitrary code.
Exploitation requires the ability to edit pages and can lead to execution of functionality on behalf of a stolen administrative account, which may then be used to install a custom plugin containing a web shell.
Remediation
Install security update from vendor's website.