CVE-2021-20873

Description

Yappli is an application development platform which provides the function to access a requested URL using Custom URL Scheme. When Android apps are developed with Yappli versions since v7.3.6 and prior to v9.30.0, they are vulnerable to improper authorization in Custom URL Scheme handler, and may be directed to unintended sites via a specially crafted URL.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory co.jp
Affected: Yappli, Inc. Yappli
Published at:
Updated at:

References

Link Tags
https://support.yappli.co.jp/hc/ja/articles/4410249902745 vendor advisory
https://jvn.jp/en/jp/JVN66422035/index.html third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-20873?
CVE-2021-20873 has been scored as a high severity vulnerability.
How to fix CVE-2021-20873?
To fix CVE-2021-20873, 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-2021-20873 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20873 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20873?
CVE-2021-20873 affects Yappli, Inc. Yappli.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.