Balbooa Forms Extension 1.0.0-2.4.3.3 Upload filename path traversal

Summaryinfo

A vulnerability was found in Balbooa Forms Extension 1.0.0-2.4.3.3. It has been declared as problematic. This impacts an unknown function of the component Upload. Executing a manipulation of the argument filename can lead to path traversal. This vulnerability appears as CVE-2026-102424. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic was found in Balbooa Forms Extension 1.0.0-2.4.3.3. This vulnerability affects some unknown processing of the component Upload. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. CVE summarizes:

Joomla Extension - balbooa.com - Unauthenticated path traversal exfiltrates local files through auto-reply attachments in Balbooa Forms < 2.4.3.4 - Balbooa Forms accepts upload-field state as Guest-controlled JSON during public form submission. For every object whose `id` merely looks numeric, the component trusts the supplied `filename`, concatenates it below the configured upload directory, and adds the result to an array of local attachment paths. It does not load the referenced attachment row, verify ownership/session/form/field, require that the ID exists, canonicalize the path, or enforce containment. If the form's normal “auto reply” and “attach uploaded files” options are enabled, the component sends those local paths as email attachments to the address submitted in an email field. A Guest can therefore submit a nonexistent numeric ID plus a traversal filename such as `../../../../configuration.php` and receive any file readable by the Joomla process.

This vulnerability was named CVE-2026-102424 since 09/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/29/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Balbooa

Name

• Forms Extension

Version

• 1.0.0-2.4.3.3

CPE 2.3info

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CPE 2.2info

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