CVE-2021-20873

CVSS V2 Medium 5.8 CVSS V3 High 8.1
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.
Overview
  • CVE ID
  • CVE-2021-20873
  • Assigner
  • vultures@jpcert.or.jp
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-28T02:15:06
  • Last Modified Date
  • 2022-01-12T15:46:08
Weakness Enumerations
CWE URL
CWE-862 http://cwe.mitre.org/data/definitions/862.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:yappli:yappli:*:*:*:*:*:*:*:* 1 OR 7.3.6 9.30.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 8.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://jvn.jp/en/jp/JVN66422035/index.html Third Party Advisory
https://support.yappli.co.jp/hc/ja/articles/4410249902745 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-20873
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20873
History
Created Old Value New Value Data Type Notes
2022-05-10 06:37:43 Added to TrackCVE
2022-12-06 05:16:31 2021-12-28T02:15Z 2021-12-28T02:15:06 CVE Published Date updated
2022-12-06 05:16:31 2022-01-12T15:46:08 CVE Modified Date updated
2022-12-06 05:16:31 Analyzed Vulnerability Status updated