{"id":"CVE-2018-9840","aliases":["EUVD-2018-21434","GHSA-9v25-mc3c-w5v3"],"status":"published","title":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass...","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","severity":{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00417,"percentile":0.36303,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-04-10T05:00:00Z","modified":"2026-10-20T10:50:32Z","products":[{"vendor":"signal","product":"signal"}],"references":[{"url":"https://github.com/signalapp/Signal-iOS/commit/018a35df7b42b4941cb4dfc9f462b37c3fafd9e9","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/signalapp/Signal-iOS/commits/release/2.23.2","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"http://nint.en.do/Signal-Bypass-Screen-locker.php","tags":["x_refsource_MISC","x_transferred","Broken Link","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-9840"},{"url":"https://github.com/advisories/GHSA-9v25-mc3c-w5v3"}],"sources":{"cve":[{"id":"CVE-2018-9840","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","status":"published","published":"2018-04-10T05:00:00Z","modified":"2024-08-05T07:24:56.258Z","updated_at":"2026-11-02T14:35:02.603326Z"}],"euvd":[{"id":"EUVD-2018-21434","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","status":"published","published":"2018-04-10T05:00:00Z","modified":"2024-08-05T07:24:56Z","updated_at":"2026-11-03T02:40:00.040327Z"}],"ghsa":[{"id":"GHSA-9v25-mc3c-w5v3","title":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass...","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","status":"published","published":"2022-05-13T01:53:56Z","modified":"2023-02-02T05:02:25Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T14:51:26.066709Z"}],"nvd":[{"id":"CVE-2018-9840","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","status":"published","published":"2018-04-10T05:29:00.207Z","modified":"2026-06-17T02:07:15.22Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:24.700429Z"}],"osv":[{"id":"CVE-2018-9840","description":"The Open Whisper Signal app before 2.23.2 for iOS allows physically proximate attackers to bypass the screen locker feature via certain rapid sequences of actions that include app opening, clicking on cancel, and using the home button.","status":"published","published":"2018-04-10T05:29:00.207Z","modified":"2026-10-20T10:50:32.475962093Z","cvss":[{"version":"3.0","score":6.8,"vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:10.051046Z"}]}}