CVE-2023-45878Public exploitNetwork attack vector

Unauthenticated code execution via arbitrary PHP file write

Published Nov 14, 2023 · Updated Jan 8, 2025

Arbitrary file write in Gibbon 25.0.1 and earlier allows remote attackers to execute PHP code through an unauthenticated Rubrics endpoint. The rubrics_visualise_saveAjax.php handler base64-decodes the img parameter and writes it under an attacker-controlled path without authentication or file-type enforcement. Network access to the endpoint is sufficient to place an executable PHP file in the installation and run commands with the web server process privileges.

CVSS severity9.8
Critical
EPSS probability63.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file write in Gibbon 25.0.1 and earlier allows remote attackers to execute PHP code through an unauthenticated Rubrics endpoint. The rubrics_visualise_saveAjax.php handler base64-decodes the img parameter and writes it under an attacker-controlled path without authentication or file-type enforcement. Network access to the endpoint is sufficient to place an executable PHP file in the installation and run commands with the web server process privileges.

The record

CVE
CVE-2023-45878
Published
Nov 14, 2023
Updated
Jan 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, CWE-787, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application
T1505.003Web 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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