CVE-2020-36320

Public Exploit
Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7

Description

Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.72% Top 30%
Vendor Advisory vaadin.com
Affected: Vaadin Vaadin
Affected: Vaadin vaadin-server
Published at:
Updated at:

References

Link Tags
https://vaadin.com/security/cve-2020-36320 vendor advisory
https://github.com/vaadin/framework/issues/7757 patch third party advisory exploit
https://github.com/vaadin/framework/pull/12104 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-36320?
CVE-2020-36320 has been scored as a high severity vulnerability.
How to fix CVE-2020-36320?
To fix CVE-2020-36320, 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-2020-36320 being actively exploited in the wild?
It is possible that CVE-2020-36320 is being exploited or will be exploited in a near future based on public information. 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-2020-36320?
CVE-2020-36320 affects Vaadin Vaadin, Vaadin vaadin-server.
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