CVE-2020-36321

Directory traversal in development mode handler in Vaadin 14 and 15-17

Description

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.55%
Vendor Advisory vaadin.com
Affected: Vaadin Vaadin
Affected: Vaadin flow-server
Published at:
Updated at:

References

Link Tags
https://vaadin.com/security/cve-2020-36321 vendor advisory
https://github.com/vaadin/flow/pull/9392 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-36321?
CVE-2020-36321 has been scored as a medium severity vulnerability.
How to fix CVE-2020-36321?
To fix CVE-2020-36321, 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-2020-36321 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-36321 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-36321?
CVE-2020-36321 affects Vaadin Vaadin, Vaadin flow-server.
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