CVE-2023-5604Public exploitNetwork attack vector

Remote code execution via configurable upload allowlist

Published Nov 27, 2023 · Updated Jun 5, 2025

Unrestricted file upload in Asgaros Forum before 2.7.1 allows remote attackers to upload executable PHP files after an unsafe setting change. The forum options flow lets forum administrators add dangerous extensions such as .php and .phtml to the upload allowlist, which the guest upload path then accepts. A forum administrator must first permit the extension; successful execution also requires the web server to execute the uploaded file type.

CVSS severity9.8
Critical
EPSS probability1.96%
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 Asgaros Forum before 2.7.1 allows remote attackers to upload executable PHP files after an unsafe setting change. The forum options flow lets forum administrators add dangerous extensions such as .php and .phtml to the upload allowlist, which the guest upload path then accepts. A forum administrator must first permit the extension; successful execution also requires the web server to execute the uploaded file type.

The record

CVE
CVE-2023-5604
Published
Nov 27, 2023
Updated
Jun 5, 2025
Vendor
Asgaros
Product
Asgaros Forum
Classifications
CWE-434, CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 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?

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

  1. Affected versionversion=0 <2.71
  2. Affected versionversion=0 <2.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Asgaros · Asgaros Forumversion=0 <2.71; version=0 <2.7.1

Published CVSS scores

6.6WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

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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