What’s Vulnerable › Vulnerabilities
CVE-2026-101127: Joomla Extension - balbooa.com - Unauthenticated upload filename stored XSS in Balbooa Forms < 2.4.3.4
- Severity: critical (CVSS 9.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-29 · updated 2026-10-06
- Weakness: CWE-79
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`.
Affected products
- balbooa.com Balbooa Forms extension for Joomla: before 2.4.3.4 — fixed in 2.4.3.4
How to fix
Upgrade to a fixed version: balbooa.com Balbooa Forms extension for Joomla 2.4.3.4. Check the vendor advisory for mitigations.
References
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