SB20260507107 - Cross-site scripting in Grav Admin Plugin

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2026-44737)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary script in the victim's browser.

The vulnerability exists due to improper neutralization of input during web page generation in the /admin/pages/[page] endpoint when handling the data[header][title] parameter. A remote privileged user can inject a crafted script payload to execute arbitrary script in the victim's browser.

User interaction is required when a victim accesses the crafted URL or clicks the folder containing the payload in the move function.

Remediation

Install update from vendor's website.

References

• https://github.com/getgrav/grav/security/advisories/GHSA-fmg2-f5r9-24qc
• https://github.com/advisories/GHSA-fmg2-f5r9-24qc