How severe is CVE-2020-21998?

CVE-2020-21998 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-21998 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21998?

CVE-2020-21998 affects Homeautomation Project Homeautomation. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21998?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-21998 published?

CVE-2020-21998 was published on 2021-04-27 and last updated on 2026-06-17.

CVE-2020-21998

CVE-2020-21998 is a medium-severity vulnerability in Homeautomation Project Homeautomation with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Homeautomation Project Homeautomation
Published: 2021-04-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-21998?: 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.
How severe is CVE-2020-21998?: CVE-2020-21998 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-21998 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21998?: CVE-2020-21998 affects Homeautomation Project Homeautomation. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21998?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-21998 published?: CVE-2020-21998 was published on 2021-04-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:homeautomation_project:homeautomation:3.3.2:*:*:*:*:*:*:*

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