CVE-2026-101127: Balbooa Forms unauthenticated upload filename stored XSS
CVE-2026-101127 · Severity: info · Published 2026-09-29
Balbooa Forms is a Joomla extension for creating online forms and collecting submissions. An attacker can upload a file to a public form with a malicious filename containing JavaScript code. When a site administrator views the submission, the injected code executes in their browser, potentially compromising their session or account and allowing the attacker to modify site content or access sensitive data.</exec_brief>
<parameter name="technical_details">The vulnerability is a stored cross-site scripting (XSS) flaw in the form upload handler. The public form endpoint accepts file uploads, validates file extensions and MIME types, but stores the user-supplied original filename from the multipart request in the database without sanitization. When an administrator retrieves the submission, client-side JavaScript concatenates the stored filename directly into HTML via innerHTML, allowing XSS execution. No authentication is required to upload the malicious file.</technical_details>
<parameter name="severity">high
No. Junglewise Threat Intelligence has no report of CVE-2026-101127 being exploited in the wild.
How severe is CVE-2026-101127?
Informational severity, published 29 September 2026.
Which products and versions are affected?
Balbooa.Com Forms before 2.4.3.4.
Is there a fix for CVE-2026-101127?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-101127 attacked?
It is attacked over the network.
Am I affected by CVE-2026-101127?
Check whether you run Balbooa.Com Forms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.