CVE-2023-46252 Cross-Site Scripting (XSS) via postMessage Handler in Squidex
Attackers can execute arbitrary scripts in victim browsers via a missing origin check in the postMessage handler of the Squidex editor SDK.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-46252?
CVE-2023-46252 is a medium-severity cross-site scripting vulnerability in squidex, published on 7 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Squidex is an open source headless CMS and content management hub. Affected versions are missing origin verification in a postMessage handler which introduces a Cross-Site Scripting (XSS) vulnerability. The editor-sdk.js file defines three different class-like functions, which employ a global message event listener: SquidexSidebar, SquidexWidget, and SquidexFormField. The registered event listener takes some action based on the type of the received message. For example, when the SquidexFormField receives a message with the type valueChanged, the value property is updated. The SquidexFormField class is for example used in the editor-editorjs.html file, which can be accessed via the public wwwroot folder. It uses the onValueChanged method to register a callback function, which passes the value provided from the message event to the editor.render. Passing an attacker-controlled value to this function introduces a Cross-Site Scripting (XSS) vulnerability.
Weakness: CWE-79
Which versions are affected by CVE-2023-46252?
It affects 1 product.
Products include Squidex.io Squidex.
How do I fix CVE-2023-46252?
No fix has been published for CVE-2023-46252 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-46252 being exploited?
There is no known exploitation of CVE-2023-46252 in the wild and no public exploit code.
Other vulnerabilities in squidex
Sources
Also known as GHSA-7q4f-fprr-5jw8.