CVE-2022-40276

Public Exploit

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Third-Party Advisory fluidattacks.com Third-Party Advisory github.com
Affected: n/a Zettlr
Published at:
Updated at:

References

Link Tags
https://github.com/Zettlr/Zettlr product third party advisory
https://fluidattacks.com/advisories/avicii/ third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2022-40276?
CVE-2022-40276 has been scored as a medium severity vulnerability.
How to fix CVE-2022-40276?
To fix CVE-2022-40276, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-40276 being actively exploited in the wild?
It is possible that CVE-2022-40276 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-40276?
CVE-2022-40276 affects n/a Zettlr.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.