CVE-2025-55835Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted PHP upload

Published Sep 12, 2025 · Updated Sep 12, 2025

Unrestricted file upload in SueamCMS 0.1.2 allows remote attackers to execute arbitrary code through the web file manager. The mgt_file.php endpoint accepts an upfiles multipart part bearing a .php filename and writes it into a web-served path without filtering the file type. CISA assesses that no authentication or user interaction is required, and requesting the uploaded PHP file executes its contents with the web server process privileges.

CVSS severity9.8
Critical
EPSS probability0.88%
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 SueamCMS 0.1.2 allows remote attackers to execute arbitrary code through the web file manager. The mgt_file.php endpoint accepts an upfiles multipart part bearing a .php filename and writes it into a web-served path without filtering the file type. CISA assesses that no authentication or user interaction is required, and requesting the uploaded PHP file executes its contents with the web server process privileges.

The record

CVE
CVE-2025-55835
Published
Sep 12, 2025
Updated
Sep 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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