CVE-2023-31505Public exploitNetwork attack vector

Authenticated code execution via accepted .phtml uploads

Published Jan 31, 2024 · Updated Jun 20, 2025

Arbitrary file upload in Schlix CMS 2.2.8-1 allows remote authenticated users to execute code through a crafted .phtml file. The core.mediamanager upload action accepts a .phtml file into a web-accessible media path, where the PHP server executes its contents. An account with Media Manager access is required; uploaded code runs in the web server context and can read sensitive host data or alter and interrupt the service.

CVSS severity7.2
High
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Schlix CMS 2.2.8-1 allows remote authenticated users to execute code through a crafted .phtml file. The core.mediamanager upload action accepts a .phtml file into a web-accessible media path, where the PHP server executes its contents. An account with Media Manager access is required; uploaded code runs in the web server context and can read sensitive host data or alter and interrupt the service.

The record

CVE
CVE-2023-31505
Published
Jan 31, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 31, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/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-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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