CVE-2025-8265Public exploitNetwork attack vector

Authenticated arbitrary file upload via file manager

Published Jul 28, 2025 · Updated Jul 28, 2025

Unrestricted file upload in 299Ko CMS 2.0.0 allows remote authenticated users with administrative access to upload arbitrary files. The /admin/filemanager/view handler accepts uploaded content without restricting dangerous file types, allowing attacker-selected files to be stored by the CMS. Administrative access to the web interface is required, and the demonstrated consequence is placement of a PHP file on the server.

CVSS severity4.7
Medium
EPSS probability0.34%
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 299Ko CMS 2.0.0 allows remote authenticated users with administrative access to upload arbitrary files. The /admin/filemanager/view handler accepts uploaded content without restricting dangerous file types, allowing attacker-selected files to be stored by the CMS. Administrative access to the web interface is required, and the demonstrated consequence is placement of a PHP file on the server.

The record

CVE
CVE-2025-8265
Published
Jul 28, 2025
Updated
Jul 28, 2025
Vendor
299Ko
Product
299Ko
Classifications
CWE-434, CWE-284, T1105
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 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=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

299Ko · 299Koversion=2.0.0

Published CVSS scores

5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A:P
2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.7VulDBCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1105Ingress Tool Transfer

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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