CVE-2020-21998

Name: CVE-2020-21998
Creator: NVD / NIST
Published: 2021-04-27T18:15:07.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.32%

Last modified Jun 17, 2026

CVE-2020-21998 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In HomeAutomation 3.3.2 input passed via the 'redirect' GET parameter in 'api.php' script is not properly verified before being used to redirect users. This can be exploited to redirect a user to an arbitrary website e.g. EPSS estimates a 1.32% chance of exploitation in the next 30 days.

Description

In HomeAutomation 3.3.2 input passed via the 'redirect' GET parameter in 'api.php' script is not properly verified before being used to redirect users. This can be exploited to redirect a user to an arbitrary website e.g. when a user clicks a specially crafted link to the affected script hosted on a trusted domain.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.32%

67.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Homeautomation Project	Homeautomation	3.3.2

References

https://cxsecurity.com/issue/WLB-2019120132Exploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5559.phpExploit, Third Party Advisory
https://cxsecurity.com/issue/WLB-2019120132Exploit, Third Party Advisory
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5559.phpExploit, Third Party Advisory

Timeline

Published: Apr 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21998?

How severe is CVE-2020-21998?

CVE-2020-21998 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.32% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21998?

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-2020-21998?

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

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Source: NVD / NIST