CVE-2023-6188Public exploitNetwork attack vector

Authenticated code execution via writable PHP template

Published Nov 17, 2023 · Updated Sep 4, 2024

Code injection in GetSimple CMS 3.3.16 and 3.4.0a allows remote authenticated users to execute PHP through the theme editor. The handler writes submitted content to a selected theme filename, and the public index includes the modified PHP template. A valid administrator session and save nonce are required; successful exploitation places server-side code in a web-executed template.

CVSS severity9.8
Critical
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Code injection in GetSimple CMS 3.3.16 and 3.4.0a allows remote authenticated users to execute PHP through the theme editor. The handler writes submitted content to a selected theme filename, and the public index includes the modified PHP template. A valid administrator session and save nonce are required; successful exploitation places server-side code in a web-executed template.

The record

CVE
CVE-2023-6188
Published
Nov 17, 2023
Updated
Sep 4, 2024
Vendor
GetSimple CMS
Product
GetSimple CMS
Classifications
CWE-94, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=3.3.16
  2. Affected versionversion=3.4.0a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

GetSimple CMS · GetSimple CMSversion=3.3.16; version=3.4.0a

Published CVSS scores

4.7VulDB CNACVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.8VulDB CNAAV:N/AC:L/Au:M/C:P/I:P/A:P
4.7VulDB CNACVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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