CVE-2022-40276 — MEDIUM (5.5)

Vulnerability 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.

CVSS Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Zettlr	Zettlr	2.3.0

Related Weaknesses (CWE)

CWE-20

References

https://fluidattacks.com/advisories/avicii/ExploitThird Party Advisory
https://github.com/Zettlr/ZettlrProductThird Party Advisory
https://fluidattacks.com/advisories/avicii/ExploitThird Party Advisory
https://github.com/Zettlr/ZettlrProductThird Party Advisory

FAQ

What is CVE-2022-40276?

CVE-2022-40276 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 app...

How severe is CVE-2022-40276?

CVE-2022-40276 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-40276?

Check the references section above for vendor advisories and patch information. Affected products include: Zettlr Zettlr.