CVE WatchOct 6, 2026

CVE-2026-101127

Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4 - The public form upload endpoint val

CVSS

9.4

Critical

EPSS

0.3%

p25

KEV

—

Exploit Today

0-100

Published: Sep 29, 2026 · Last modified: Oct 6, 2026 · CWE-79

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-09-302026-10-19

Technical description

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 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`.

Official references

www.balbooa.comhttps://www.balbooa.com/

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