CVE-2026-88857Network attack vector

Privileged code execution via unrestricted PHP upload

Published Sep 20, 2026 · Updated Sep 20, 2026

Unrestricted file upload in OrdaSoft Joomla Gallery editions 1.0.0 through 6.2.6 allows remote authenticated users to execute PHP code. The saveWatermark() function copies an upload into a web-accessible directory under its client-supplied filename without extension, content, or filename validation. Exploitation requires core.manage permission; the uploaded script runs under the web service account when its public path is requested.

CVSS severity9.4
Critical
EPSS probability0.64%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in OrdaSoft Joomla Gallery editions 1.0.0 through 6.2.6 allows remote authenticated users to execute PHP code. The saveWatermark() function copies an upload into a web-accessible directory under its client-supplied filename without extension, content, or filename validation. Exploitation requires core.manage permission; the uploaded script runs under the web service account when its public path is requested.

The record

CVE
CVE-2026-88857
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
OrdaSoft
Product
OrdaSoft Joomla Gallery
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=1.0.0-6.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OrdaSoft · OrdaSoft Joomla Galleryversion=1.0.0-6.2.6
OrdaSoft · OrdaSoft Joomla Gallery Freeversion=1.0.0-6.2.6

Published CVSS scores

9.4Joomla CNACVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

No public exploit references are available in this record.

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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