CVE-2026-10806Public exploitNetwork attack vector

Authenticated code execution via disjunctive upload validation

Published Jun 4, 2026 · Updated Jun 4, 2026

Unrestricted file upload in mjperpinosa stumasy allows remote authenticated users to execute PHP code through a crafted post attachment. The add_post.php handler accepts an upload when either its claimed MIME type or filename extension is allowlisted, then stores the original filename in a web-accessible directory. A valid session and a server configured to execute PHP from documents/files are required; a forged PDF MIME type on a .php file yields code execution.

CVSS severity6.3
Medium
EPSS probability0.21%
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 mjperpinosa stumasy allows remote authenticated users to execute PHP code through a crafted post attachment. The add_post.php handler accepts an upload when either its claimed MIME type or filename extension is allowlisted, then stores the original filename in a web-accessible directory. A valid session and a server configured to execute PHP from documents/files are required; a forged PDF MIME type on a .php file yields code execution.

The record

CVE
CVE-2026-10806
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
mjperpinosa
Product
stumasy
Classifications
CWE-434, CWE-284, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record 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=25d695901fbb586bf184b8ba73456d8e5311656c
  2. Affected versionversion=327d1b0f2915ba79d7ef8ebb74553e987609d9be
  3. Affected versionversion=79c86fce86a09adc6edcbd6d56115fbff14ed538

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

mjperpinosa · stumasyversion=25d695901fbb586bf184b8ba73456d8e5311656c; version=327d1b0f2915ba79d7ef8ebb74553e987609d9be; version=79c86fce86a09adc6edcbd6d56115fbff14ed538

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1505.003Web 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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