SB2024030447 - Arbitrary file upload in Form plugin for Grav CMS

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Main Vulnerability Database SB2024030447

SB2024030447 - Arbitrary file upload in Form plugin for Grav CMS

Published: March 4, 2024 Updated: May 20, 2026

Security Bulletin ID SB2024030447
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Arbitrary file upload (CVE-ID: CVE-2024-27923)

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

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


The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to improper access control and unrestricted upload of file with dangerous type in the frontmatter form handling feature when creating a page and submitting a crafted contact form. A remote user can add the data[_json][header][form] parameter to enable frontmatter, create a form that saves a .phar file, and submit PHP code to execute arbitrary code.

Exploitation requires an account capable of creating pages.


Remediation

Install update from vendor's website.

References