Endatix up to 0.6.x SubmissionFileExtractor SubmissionFileExtractor.cs GetFilesHandler information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in Endatix up to 0.6.x. This vulnerability affects the function GetFilesHandler of the file src/Endatix.Infrastructure/Features/Submissions/SubmissionFileExtractor.cs of the component SubmissionFileExtractor. Executing a manipulation can lead to information disclosure. This vulnerability is registered as CVE-2026-61529. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Endatix up to 0.6.x. It has been declared as problematic. This vulnerability affects the function GetFilesHandler of the file src/Endatix.Infrastructure/Features/Submissions/SubmissionFileExtractor.cs of the component SubmissionFileExtractor. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Endatix is a self-hosted form and survey management platform with a headless API. Prior to 0.7.0, the anonymous `POST /forms/{formId}/submissions` endpoint stores attacker-controlled `JsonData` after checking only that the JSON is well formed. A file object with `name`, `type` and `content` fields can contain an HTTP or HTTPS URL. When a staff member with `submissions.view` permission invokes `POST /forms/{formId}/submissions/{submissionId}/files`, `GetFilesHandler` passes the stored data to `SubmissionFileExtractor` in `src/Endatix.Infrastructure/Features/Submissions/SubmissionFileExtractor.cs`, which calls `HttpClient.GetAsync` without validating the destination URL, host or resolved IP addresses against internal address ranges. This permits stored, second-order server-side GET requests to internal services, cloud metadata, loopback and link-local addresses from the server's network position. The form must have `IsPublic` and `IsEnabled` set, and an anonymous submission must pass reCAPTCHA v3 when configured. The fetched response is placed in the staff viewer's ZIP, not returned directly to the attacker, so disclosure to the attacker is blind or indirect through observable request behavior or information exposed by the viewer. No integrity or availability impact is asserted; data: and raw-base64 `content` are decoded locally without network requests. This issue is fixed in version 0.7.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-61529 since 07/10/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 0.7.0 eliminates this vulnerability.

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Productinfo

Name

• Endatix

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6

Website

• Product: https://github.com/endatix/endatix/

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