# CVE-2026-31016
## About the Application
Squidex is an open source, headless content management system (CMS) and content management hub providing an API-first platform for managing and delivering content.
## About the Finding
Squidex CMS v7.21.0 and below are susceptible to a clickjacking vulnerability consistent with CWE‑1021, where insufficient anti framing controls allow the profile management page to be rendered within an attacker controlled frame.
## Proof of Concept
Create HTML file with Proof of Concept content below and upload into assets. Access the uploaded file directly to observe the HTML page loading with iFrame loading in the profile management page.
```
Example layout
Claim your prize!
For verification purposes, enter organiser's email below and click Verify
```
Youtube demonstration video .
## Conclusion
Where profile management operations include email address changes without verification, UI redress can induce state changes with durable security consequences, including account integrity compromise and potential account recovery pivot scenarios. Industry guidance identifies CSP frame-ancestors (preferably frame-ancestors 'none' for sensitive UI) and, where applicable, X-Frame-Options as primary mitigations to prevent clickjacking by disallowing framing.
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# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://lgnas.gitbook.io/findings/cve-2026-31016.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.