Vulnerability Report

CVE-2026-42607

RCE

Title: Authenticated RCE in Grav Direct Install

RCE, Web Shell

Proof Of Concept

PoC Available for CVE-2026-42607

CWE Category CWE-94

Published Date May 11, 2026

Modified Date May 12, 2026

Exploit Status Available

Score 9.1 CVSS v3.1

Exploit Probability (EPSS)

3.93%

Vulnerability Summary

CVE-2026-42607: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663 https://github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.1

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-42607 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/52578

View Code

May 12, 2026 MODIFIED

Vulnerability data updated via NVD.

May 11, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Stack

No specific products linked.