Path Traversal in Vaadin Flow
CVE-2020-36321
Improper URL validation in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.4.1 (Vaadin 14.0.0 through 14.4.2), and 3.0 prior to 5.0 (Vaadin 15 prior to 18) allows attacker to request arbitrary files stored outside of intended frontend resources folder.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.012 (66.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Vaadin Flow
- Vaadin Flow-server — versions 2.0.0
- Vaadin — versions 14.0.0
Weakness classification (CWE)
References
- security@vaadin.com (x_refsource_MISC, Vendor Advisory)
- security@vaadin.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-36321?
- CVE-2020-36321 is a medium-severity vulnerability in Vaadin Flow, classified under Path Traversal. CVSS score: 5.9/10. Published 2021-04-23.
- How severe is CVE-2020-36321?
- Medium severity. CVSS v3 base score is 5.9 out of 10.