CVE-2023-46042Public exploitNetwork attack vector

Authenticated code execution via theme file write

Published Oct 19, 2023 · Updated Sep 12, 2024

Arbitrary code execution in GetSimpleCMS 3.4.0a allows remote authenticated users to write executable PHP through the theme editor. The admin/theme-edit.php handler passes posted content to save_file for a selected theme file, including functions.php, after login and CSRF checks. An authenticated administrative session and a valid save nonce are required; the published demonstration does not establish an unauthenticated path.

CVSS severity9.8
Critical
EPSS probability22.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary code execution in GetSimpleCMS 3.4.0a allows remote authenticated users to write executable PHP through the theme editor. The admin/theme-edit.php handler passes posted content to save_file for a selected theme file, including functions.php, after login and CSRF checks. An authenticated administrative session and a valid save nonce are required; the published demonstration does not establish an unauthenticated path.

The record

CVE
CVE-2023-46042
Published
Oct 19, 2023
Updated
Sep 12, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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