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Vulnerability Intelligence Report
Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4

CVE-2026-101127

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`.

Cross-Site Scripting (XSS) No Active Exploit Signals
CVSS Base Score
8.6
HIGH
EPSS Probability:0.32%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—

Weaknesses (CWE)

CWE-79 ↗CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products & Versions

Vendor Product Affected Versions
balbooa.com Balbooa Forms extension for Joomla 1.0.0-2.4.3.3 (affected)

References & Technical Advisories

No reference links found.

Threat Intelligence Signals

EPSS Score
0.318%
Vulnerability Class
Cross-Site Scripting (XSS)

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityJoomla! Project · Vendor · USA
Reserved2026-09-28T07:02:41
Published2026-09-29T16:57:36
Last Updated2026-10-01T04:45:23

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