CVE-2020-21998 json
In HomeAutomation 3.3.2 input passed via the 'redirect' GET parameter in 'api.php' script is not properly verified before being used to red…
published 2021-04-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-14764
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Exploit prediction
1.32% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template HomeAutomation 3.3.2 - Open Redirect nuclei detection template
- zeroscience.mk https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5559.php referenced PoC, tagged "exploit" by a source, unverified
- cxsecurity.com https://cxsecurity.com/issue/WLB-2019120132 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
zeroscience.mk
/en/vulnerabilities/ZSL-2019-5559.php
exploit, third-party-advisory
-
cxsecurity.com
/issue/WLB-2019120132
exploit, third-party-advisory
Sources
- CVE List CVE-2020-21998
- NVD CVE-2020-21998
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