{"id":"CVE-2021-33839","aliases":["EUVD-2021-20513","GHSA-x4jr-cxw4-2x5h"],"status":"published","title":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID...","description":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.02765,"percentile":0.86483,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2021-06-03T23:58:01Z","modified":"2026-06-17T03:55:17Z","products":[{"vendor":"luca-app","product":"luca"}],"references":[{"url":"https://github.com/mame82/misc/blob/master/luca_traceIds.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://luca-app.de/securityoverview/properties/objectives.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://youtu.be/jWyDfEB0m08","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://twitter.com/patrick_hennig/status/1387738281757061125","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33839"},{"url":"https://github.com/advisories/GHSA-x4jr-cxw4-2x5h"}],"sources":{"cve":[{"id":"CVE-2021-33839","description":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.","status":"published","published":"2021-06-03T23:58:01Z","modified":"2024-08-03T23:58:23.171Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20513","description":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.","status":"published","published":"2021-06-03T23:58:01Z","modified":"2024-08-03T23:58:23Z","updated_at":"2026-11-03T03:24:33.318275Z"}],"ghsa":[{"id":"GHSA-x4jr-cxw4-2x5h","title":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID...","description":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.","status":"published","published":"2022-05-24T19:04:08Z","modified":"2023-01-29T05:06:54Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:46:06.857512Z"}],"nvd":[{"id":"CVE-2021-33839","description":"Luca through 1.7.4 on Android allows remote attackers to obtain sensitive information about COVID-19 tracking because the QR code of a Public Location can be intentionally confused with the QR code of a Private Meeting.","status":"published","published":"2021-06-04T00:15:07.377Z","modified":"2026-06-17T03:55:17.49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}