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CVE-2026-42607

Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature

Published: May 11, 2026Updated: May 12, 2026 Sources: CVE List NVDCWE-94
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
3.9%
Top 11.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-94

Affected Products

gravgetgrav
On-prem
Web & CMS Plugins / cms-core
getgravoss-projectWeb & CMS Pluginsaka grav, grav-plugin-admin, getgrav/grav

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

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

Timeline

Published
May 11, 2026
Last Updated
May 12, 2026

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