Balbooa Forms Extension up to 1.0.0/2.4.3.3 Public Form Upload Endpoint cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Balbooa Forms Extension up to 1.0.0/2.4.3.3. Affected by this vulnerability is an unknown functionality of the component Public Form Upload Endpoint. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2026-101127. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Balbooa Forms Extension up to 1.0.0/2.4.3.3. Affected by this vulnerability is an unknown code of the component Public Form Upload Endpoint. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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`.

This vulnerability is known as CVE-2026-101127 since 09/28/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Balbooa

Name

• Forms Extension

Version

• 1.0
• 2.4.3.0
• 2.4.3.1
• 2.4.3.2
• 2.4.3.3

CPE 2.3info

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CPE 2.2info

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