VULNERABILITY INTELLIGENCE

CVE-2021-20873

CVSS score8.1 HIGH
EPSS probability0.87%
CISA KEVNot currently listed
Published2021-12-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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.

Weakness classification

  • CWE-862: Missing Authorization

Primary references