{"cve":"CVE-2020-5523","nvd":{"published":"2020-01-28T06:15:12.353","modified":"2026-06-17T03:21:32.180","status":"Modified","description":"Android App 'MyPallete' and some of the Android banking applications based on 'MyPallete' do not verify X.509 certificates from servers, and also do not properly validate certificates with host-mismatch, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4},"cwes":["CWE-295"],"references":["http://jvn.jp/en/jp/JVN28845872/index.html","http://www.dokodemobank.ne.jp/info_20200128_bankingapp.html","https://www.77bank.co.jp/pdf/oshirase/20012801_appvulnerability.pdf","https://www.ashikagabank.co.jp/appbanking/pdf/oshirase.pdf","https://www.hokkaidobank.co.jp/common/dat/2020/0120/15795047141946146699.pdf"],"products":["77bank:77_bank","ashikagabank:ashigin","hokkaidobank:dogin","hokugin:hokuriku_bank_portal","naganobank:nagagin","nttdata:mypallete","shikokubank:shikoku_bank","sihd-bk:ikeda_senshu_bank","tohoku-bank:tougin"],"source":"nvd","synced_at":"2026-10-19T21:01:01.339895972+00:00"},"epss":{"cve":"CVE-2020-5523","score":0.01175,"percentile":0.6757,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}