CVE-2026-42607
CRITICALGrav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-42607. PoCs published by Mustafa Murat Akgül.
AI-analyzed exploit summary The exploit leverages a Zip Slip vulnerability in Grav CMS's Direct Install feature to achieve RCE by uploading a malicious plugin that drops a web shell. The payload hooks into Grav's event system to execute arbitrary PHP code upon plugin initialization.
Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, an authenticated user with administrative privileges can achieve Remote Code Execution (RCE) by uploading a specially crafted ZIP file through the "Direct Install" tool. While the system attempts to block direct .php file uploads, it fails to inspect the contents of uploaded ZIP archives. Once a malicious plugin is extracted, it can execute arbitrary PHP code or drop a persistent web shell on the server. This vulnerability is fixed in 2.0.0-beta.2.
Exploits (1)
The exploit leverages a Zip Slip vulnerability in Grav CMS's Direct Install feature to achieve RCE by uploading a malicious plugin that drops a web shell. The payload hooks into Grav's event system to execute arbitrary PHP code upon plugin initialization.
References (2)
Scores
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H