CVE-2021-31407

Name: CVE-2021-31407
Creator: NVD / NIST
Published: 2021-04-23T16:15:08.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.38%

Last modified Jun 17, 2026

CVE-2021-31407 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.38% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.38%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vaadin	Flow	>= 1.2.0, < 2.4.8
Vaadin	Flow	>= 6.0.0, < 6.0.2
Vaadin	Vaadin	>= 12.0.0, < 14.4.10
Vaadin	Vaadin	19.0.0

References

https://github.com/vaadin/flow/pull/10229Patch, Third Party Advisory
https://github.com/vaadin/flow/pull/10269Patch, Third Party Advisory
https://github.com/vaadin/osgi/issues/50Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-31407Vendor Advisory
https://github.com/vaadin/flow/pull/10229Patch, Third Party Advisory
https://github.com/vaadin/flow/pull/10269Patch, Third Party Advisory
https://github.com/vaadin/osgi/issues/50Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-31407Vendor Advisory

Timeline

Published: Apr 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31407?

How severe is CVE-2021-31407?

CVE-2021-31407 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31407?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-31407?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST