{"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":0.00467,"epssPercentile":0.3967,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-21T16:25:23.553570Z"},"cvssSource":"cna","ingestedAt":"2026-09-20T18:24:59.757Z","slug":"CVE-2026-88857","body":"## Overview\n\nJoomla 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":51.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}