---
id: CVE-2026-88857
title: >-
  Joomla Extension - OrdaSoft.com - Authenticated, Privileged Remote Code
  Execution in OrdaSoft Joomla Gallery extension for Joomla < 6.2.7 - The
  extensions saveWatermark() copied an uploaded file into a web-accessible
  directory using the …
summary: >-
  Joomla Extension - OrdaSoft.com - Authenticated, Privileged Remote Code
  Execution in OrdaSoft Joomla Gallery extension for Joomla < 6.2.7 - The
  extensions saveWatermark() copied an uploaded file into a web-accessible
  directory using the …
severity: critical
cvss: 9.4
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-434
vendor: OrdaSoft.com
product: com_osgallery_light
affected:
  - com_osgallery_light 1.0.0-6.2.6
  - com_osgallery 1.0.0-6.2.6
published: '2026-09-20'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:34:57.263'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88857'
references:
  - url: 'https://www.OrdaSoft.com/'
    label: security@joomla.org
tags:
  - nvd
  - cve.org
epss: 0.00642
epssPercentile: 0.48579
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-21T16:25:23.553570Z'
cvssSource: cna
ingestedAt: '2026-09-20T18:24:59.757Z'
---

## Overview

Joomla Extension - OrdaSoft.com - Authenticated, Privileged Remote Code Execution in OrdaSoft Joomla Gallery extension for Joomla < 6.2.7 - The extensions saveWatermark() copied an uploaded file into a web-accessible directory using the client-supplied filename exactly as sent, with no extension check, no content check, and no filename sanitisation of any kind. An authenticated core.manage user could upload a .php file disguised with an image Content-Type header and execute it directly by requesting the resulting path.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.