Description
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.
Published: 2026-10-28
Score: 4.7 Medium
EPSS: n/a
KEV: No
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History

Wed, 28 Oct 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Endatix: Blind second-order SSRF via anonymous form-submission file URLs (`SubmissionFileExtractor`)
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-28T19:43:17.490Z

Reserved: 2026-07-10T16:27:03.092Z

Link: CVE-2026-61529

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-28T20:18:27.060

Modified: 2026-10-28T20:18:27.060

Link: CVE-2026-61529

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses