CVE-2020-18683

Name: CVE-2020-18683
Creator: NVD / NIST
Published: 2021-09-30T02:15:06.663+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.25%

Last modified Jun 17, 2026

CVE-2020-18683 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Floodlight through 1.2 has poor input validation in checkFlow in StaticFlowEntryPusherResource.java because of undefined fields mishandling.. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

Description

Floodlight through 1.2 has poor input validation in checkFlow in StaticFlowEntryPusherResource.java because of undefined fields mishandling.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.25%

65.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Atlassian	Floodlight	<= 1.2

References

https://drive.google.com/open?id=15I75JBmFYB9rLm9ZvcFtjHy0e2a-9lyOExploit, Third Party Advisory
https://drive.google.com/open?id=15I75JBmFYB9rLm9ZvcFtjHy0e2a-9lyOExploit, Third Party Advisory

Timeline

Published: Sep 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-18683?

Floodlight through 1.2 has poor input validation in checkFlow in StaticFlowEntryPusherResource.java because of undefined fields mishandling.

How severe is CVE-2020-18683?

CVE-2020-18683 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.

How do I fix CVE-2020-18683?

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-2020-18683?

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

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Source: NVD / NIST