Open redirect in Form plugin for Grav CMS - #VU138912
Published: July 21, 2026
Vulnerability identifier: #VU138912
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear
CVE-ID: N/A
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Grav CMS
Affected software:
Form plugin for Grav CMS
Form plugin for Grav CMS
Detailed vulnerability description
The vulnerability allows a remote attacker to redirect victims to arbitrary URL.
The vulnerability exists due to improper sanitization of user-supplied data within "{{ form.value() }}" twig evaluation. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain.
Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.
Remediation
Install updates from vendor's website.