CVE-2024-27923

Remote Code Execution by uploading a phar file using frontmatter

HIGH
8.8
CVSS Score
Published: March 6, 2024 at 08:28 PM UTC
Updated: June 17, 2026 at 07:20 AM UTC
1 product affected across 1 vendorGrav

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Severity
HIGH8.8
Exploit prediction
EPSS 1%
SSVC
PoC

Description

Grav is a content management system (CMS). Prior to version 1.7.43, users who may write a page may use the `frontmatter` feature due to insufficient permission validation and inadequate file name validation. This may lead to remote code execution. Version 1.7.43 fixes this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%
v < 1.7.43
Affected range stops below 1.7.43, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-287CWE-434

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