CVE-2021-31407 Server classes and resources exposure in OSGi applications using Vaadin 12-14 and 19

What is CVE-2021-31407?

CVE-2021-31407 is a high-severity vulnerability in Vaadin, published on 23 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in OSGi integration in com.vaadin:flow-server versions 1.2.0 through 2.4.7 (Vaadin 12.0.0 through 14.4.9), and 6.0.0 through 6.0.1 (Vaadin 19.0.0) allows attacker to access application classes and resources on the server via crafted HTTP request.

Weakness: CWE-668, CWE-402

Which versions are affected by CVE-2021-31407?

4 open source packages ship an affected version, including com.vaadin:flow-server. It affects 2 products.

Products include Vaadin Flow, Vaadin Vaadin.

How do I fix CVE-2021-31407?

Upgrade com.vaadin:flow-server to a fixed version for your release line: 2.4.8 or 6.0.1.

Is CVE-2021-31407 being exploited?

There is no known exploitation of CVE-2021-31407 in the wild and no public exploit code.

Other vulnerabilities in Vaadin

• CVE-2021-31405 Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-17 High 7.5
• CVE-2021-31411 Insecure temporary directory usage in frontend build functionality of Vaadin 14 and 15-19 Medium 6.3
• CVE-2021-31408 Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19 Medium 6.3
• CVE-2019-25027 Reflected cross-site scripting in default RouteNotFoundError view in Vaadin 10 and 11-13 Medium 6.1
• CVE-2020-36321 Directory traversal in development mode handler in Vaadin 14 and 15-17 Medium 5.9

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-25xc-jwfq-39jw.