CVE-2024-27923Public exploitNetwork attack vector

Authenticated RCE via frontmatter PHAR upload

Published Mar 6, 2024 · Updated Aug 2, 2024

Unrestricted file upload in GetGrav Grav before 1.7.43 allows remote authenticated users with page-write access to execute code. The page-save endpoint accepts data[_json][header][form] from non-administrators, and the form save action writes a .phar filename absent extension blocking. A regular account that can create pages can plant PHP in the web-accessible user/data path and run commands with the web server's privileges.

CVSS severity8.8
High
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in GetGrav Grav before 1.7.43 allows remote authenticated users with page-write access to execute code. The page-save endpoint accepts data[_json][header][form] from non-administrators, and the form save action writes a .phar filename absent extension blocking. A regular account that can create pages can plant PHP in the web-accessible user/data path and run commands with the web server's privileges.

The record

CVE
CVE-2024-27923
Published
Mar 6, 2024
Updated
Aug 2, 2024
Vendor
GetGrav
Product
Grav
Classifications
CWE-287, CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.7.43
  2. Affected versionversion=< 1.7.43

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GetGrav · Gravversion=0 <1.7.43; version=< 1.7.43

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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