A vulnerability was found in Zettlr up to 2.3.0. It has been rated as critical. This issue affects some unknown processing of the component Markdown File Handler. The manipulation with an unknown input leads to a permissive cross-domain policy with untrusted domains vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is confidentiality. The summary by CVE is:

Zettlr version 2.3.0 allows an external attacker to remotely obtain arbitrary local files on any client that attempts to view a malicious markdown file through Zettlr. This is possible because the application does not have a CSP policy (or at least not strict enough) and/or does not properly validate the contents of markdown files before rendering them.

The weakness was shared 11/04/2022. It is possible to read the advisory at fluidattacks.com. The identification of this vulnerability is CVE-2022-40276 since 09/08/2022. The exploitation is known to be difficult. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

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

Productinfo

Name

• Zettlr

Version

• 2.0
• 2.1
• 2.2
• 2.3

CPE 2.3info

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CPE 2.2info

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