CVE-2022-40276

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
n/a	Zettlr	2.3.0

References

https://fluidattacks.com/advisories/avicii/Exploit, Third Party Advisory
https://github.com/Zettlr/ZettlrProduct, Third Party Advisory
https://fluidattacks.com/advisories/avicii/Exploit, Third Party Advisory
https://github.com/Zettlr/ZettlrProduct, Third Party Advisory

Timeline

Published: Nov 3, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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