{"id":"CVE-2021-20747","aliases":["EUVD-2021-8161","GHSA-6669-c2mr-pv93"],"status":"published","title":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android...","description":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01004,"percentile":0.63233,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2021-07-14T01:20:23Z","modified":"2026-06-17T03:34:21Z","products":[{"vendor":"retty","product":"retty"},{"vendor":"retty inc.","product":"retty app"}],"references":[{"url":"https://drive.google.com/file/d/1PBYqIsK8QxEEhGJ4SEgpY7iZw3RTTDho/view","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://jvn.jp/en/jp/JVN26891339/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20747"},{"url":"https://github.com/advisories/GHSA-6669-c2mr-pv93"}],"sources":{"cve":[{"id":"CVE-2021-20747","description":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.","status":"published","published":"2021-07-14T01:20:23Z","modified":"2024-08-03T17:53:21.979Z","updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2021-8161","description":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.","status":"published","published":"2021-07-14T01:20:23Z","modified":"2024-08-03T17:53:21Z","updated_at":"2026-11-03T03:25:08.33351Z"}],"ghsa":[{"id":"GHSA-6669-c2mr-pv93","title":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android...","description":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.","status":"published","published":"2022-05-24T19:08:04Z","modified":"2023-01-30T05:00:45Z","cwes":["CWE-862"],"updated_at":"2026-11-02T14:46:16.34482Z"}],"nvd":[{"id":"CVE-2021-20747","description":"Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.","status":"published","published":"2021-07-14T02:15:07.443Z","modified":"2026-06-17T03:34:21.8Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}