Improper input validation in Zettlr
CVE-2022-40276
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Zettlr — versions 2.3.0
- Zettlr — versions 2.3.0
Weakness classification (CWE)
References
- github.com/Zettlr/Zettlr (Product, Third Party Advisory)
- fluidattacks.com/advisories/avicii/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-40276?
- CVE-2022-40276 is a medium-severity vulnerability in Zettlr, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2022-11-03.
- How severe is CVE-2022-40276?
- Medium severity. CVSS v3 base score is 5.5 out of 10.