{"id":"CVE-2026-101127","title":"Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied ori…","summary":"Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied ori…","severity":"high","cvss":8.6,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-79"],"vendor":"balbooa.com","product":"com_baforms","affected":["com_baforms 1.0.0-2.4.3.3"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T17:17:05.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-101127","references":[{"url":"https://www.balbooa.com/","label":"security@joomla.org"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-29T17:41:02.203Z","slug":"CVE-2026-101127","body":"## Overview\n\nJoomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint validates the uploaded file's extension and detected MIME type, but stores the attacker-supplied original multipart filename verbatim in `#__baforms_submissions_attachments.name`. A later anonymous form submission associates that temporary attachment with the newly created submission. When an administrator opens the submission, the component's JavaScript retrieves the stored attachment record and concatenates `file.name` directly into an HTML string. The complete string is assigned to `innerHTML`.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}