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CVE-2026-101127— Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4

Quick assessment

Affected
balbooa.com Balbooa Forms extension for Joomla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 filenam

CVSS 8.6 · High
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I. Basic Information for CVE-2026-101127

Vulnerability Information

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Vulnerability Title
Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4
Source: CVE Program / CVE List V5
Vulnerability 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`.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
balbooa.com Balbooa Forms extension for Joomla 1.0.0-2.4.3.3 -

II. Public POCs for CVE-2026-101127

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III. Intelligence Information for CVE-2026-101127

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Vendor Pages for CVE-2026-101127 (1)

Same Patch Batch · balbooa.com · 2026-09-29 · 5 CVEs total

CVE-2026-102425 9.5 CRITICAL Joomla Extension - balbooa.com - Unauthenticated RCE via field shortcode injection in Balb
CVE-2026-102424 8.9 HIGH Joomla Extension - balbooa.com - Unauthenticated path traversal exfiltrates local files th
CVE-2026-101112 6.9 MEDIUM Joomla Extension - balbooa.com - Unauthorized Deletion of Attachments in Balbooa Forms < 2
CVE-2026-101126 6.9 MEDIUM Joomla Extension - balbooa.com - File meta data tampering in Balbooa Forms < 2.4.3.4

IV. Related Vulnerabilities

Same product: Balbooa Forms extension for Joomla
Same vendor: balbooa.com
Same weakness: CWE-79

V. Comments for CVE-2026-101127

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