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CVE-2026-101127

Balbooa Forms cross-site scripting (XSS)

9.4 CRITICALEPSS 0.33%
  1. Published29 Sept 2026

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`.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

Balbooa Forms< 2.4.3.4

Remediation

Fixed in
Balbooa Forms≥ 2.4.3.4

References

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Frequently asked

Is CVE-2026-101127 being actively exploited?

CVE-2026-101127 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.33%.

How severe is CVE-2026-101127?

CVE-2026-101127 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.33% probability of exploitation.

Which products are affected by CVE-2026-101127?

Affected products include Balbooa Forms.

How do I fix CVE-2026-101127?

Upgrade affected software to a fixed version, for example Balbooa Forms 2.4.3.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-101127 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.