What is CVE-2020-36321?

CVE-2020-36321 is a medium-severity vulnerability in Vaadin Flow-server, 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.

Path Traversal in Vaadin Flow-server

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 outsi…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.006 (68.4th 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-server — versions 2.0.0
Vaadin — versions 14.0.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

vaadin.com/security/cve-2020-36321 (x_refsource_MISC)
github.com/vaadin/flow/pull/9392 (x_refsource_MISC)

Frequently asked questions

What is CVE-2020-36321?: CVE-2020-36321 is a medium-severity vulnerability in Vaadin Flow-server, 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.