CVE-2026-101127 Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4
An attacker can inject malicious scripts via uploaded filenames, leading to XSS when administrators view submissions in the Balbooa Forms extension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-101127?
CVE-2026-101127 is a high-severity cross-site scripting vulnerability in balbooa.com Balbooa Forms extension for Joomla, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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`.
Weakness: CWE-79
Which versions are affected by CVE-2026-101127?
It affects 1 product.
Products include Balbooa Forms.
How do I fix CVE-2026-101127?
No fix has been published for CVE-2026-101127 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-101127 being exploited?
There is no known exploitation of CVE-2026-101127 in the wild and no public exploit code.
Other vulnerabilities in balbooa.com Balbooa Forms extension for Joomla
- CVE-2026-56291 Balbooa Forms Unrestricted Upload of File with Dangerous Type
- CVE-2026-102425 Joomla Extension - balbooa.com - Unauthenticated RCE via field shortcode injection in Balbooa Forms < 2.4.3.4
- CVE-2026-102424 Path traversal in Balbooa Forms extension for Joomla
- CVE-2026-101112 Joomla Extension - balbooa.com - Unauthorized Deletion of Attachments in Balbooa Forms < 2.4.3.4
- CVE-2026-101126 Joomla Extension - balbooa.com - File meta data tampering in Balbooa Forms < 2.4.3.4
Sources
Also known as GHSA-r586-6h3h-vc7q.