{"id":"CVE-2019-12383","aliases":["DEBIAN-CVE-2019-12383","EUVD-2019-4018","GHSA-9c7r-v445-c52r"],"status":"published","title":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to...","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","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":0.02164,"percentile":0.82386,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203"],"published":"2019-05-28T02:21:05Z","modified":"2026-09-21T07:02:01Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"firefox-esr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["102.11.0esr-1","102.12.0esr-1","102.12.0esr-1~deb10u1","102.12.0esr-1~deb11u1","102.12.0esr-1~deb12u1","102.13.0esr-1","102.13.0esr-1~deb10u1","102.13.0esr-1~deb11u1","102.13.0esr-1~deb12u1","102.14.0esr-1~deb10u1","102.14.0esr-1~deb11u1","102.14.0esr-1~deb12u1","102.15.0esr-1~deb10u1","102.15.0esr-1~deb11u1","102.15.0esr-1~deb12u1","102.15.1esr-1~deb10u1","102.15.1esr-1~deb11u1","102.15.1esr-1~deb12u1","115.0.2esr-1","115.1.0esr-1","115.10.0esr-1","115.10.0esr-1~deb10u1","115.10.0esr-1~deb11u1","115.10.0esr-1~deb12u1","115.11.0esr-1","115.11.0esr-1~deb10u1","115.11.0esr-1~deb11u1","115.11.0esr-1~deb12u1","115.12.0esr-1","115.12.0esr-1~deb10u1","115.12.0esr-1~deb11u1","115.12.0esr-1~deb12u1","115.13.0esr-1","115.13.0esr-1~deb11u1","115.13.0esr-1~deb12u1","115.13.0esr-2","115.14.0esr-1","115.14.0esr-1~deb11u1","115.14.0esr-1~deb12u1","115.15.0esr-1","115.15.0esr-1~deb11u1","115.15.0esr-1~deb12u1","115.2.0esr-1","115.2.1esr-1","115.3.0esr-1","115.3.0esr-1~deb10u1","115.3.0esr-1~deb11u1","115.3.0esr-1~deb12u1","115.3.1esr-1~deb10u1","115.3.1esr-1~deb11u1","115.4.0esr-1","115.4.0esr-1~deb10u1","115.4.0esr-1~deb11u1","115.4.0esr-1~deb12u1","115.5.0esr-1","115.5.0esr-1~deb10u1","115.5.0esr-1~deb11u1","115.5.0esr-1~deb12u1","115.6.0esr-1","115.6.0esr-1~deb10u1","115.6.0esr-1~deb11u1","115.6.0esr-1~deb12u1","115.7.0esr-1","115.7.0esr-1~deb10u1","115.7.0esr-1~deb11u1","115.7.0esr-1~deb12u1","115.8.0esr-1","115.8.0esr-1~deb10u1","115.8.0esr-1~deb11u1","115.8.0esr-1~deb12u1","115.9.0esr-1","115.9.0esr-1~deb11u1","115.9.0esr-1~deb12u1","115.9.0esr-2","115.9.1esr-1","115.9.1esr-1~deb10u1","115.9.1esr-1~deb11u1","115.9.1esr-1~deb12u1","128.10.0esr-1","128.10.0esr-1~deb12u1","128.10.1esr-1","128.10.1esr-1~deb11u1","128.10.1esr-1~deb12u1","128.11.0esr-1","128.11.0esr-1~deb11u1","128.11.0esr-1~deb12u1","128.12.0esr-1","128.12.0esr-1~deb11u1","128.12.0esr-1~deb12u1","128.13.0esr-1","128.13.0esr-1~deb11u1","128.13.0esr-1~deb12u1","128.14.0esr-1","128.14.0esr-1~deb11u1","128.14.0esr-1~deb12u1","128.14.0esr-1~deb13u1","128.3.0esr-1","128.3.0esr-1~deb11u1","128.3.0esr-1~deb11u2","128.3.0esr-1~deb12u1","128.3.0esr-2","128.3.1esr-1","128.3.1esr-1~deb11u1","128.3.1esr-1~deb12u1","128.3.1esr-2","128.4.0esr-1","128.4.0esr-1~deb11u1","128.4.0esr-1~deb12u1","128.5.0esr-1","128.5.0esr-1~deb11u1","128.5.0esr-1~deb12u1","128.5.1esr-1","128.6.0esr-1","128.6.0esr-1~deb11u1","128.6.0esr-1~deb11u2","128.6.0esr-1~deb11u3","128.6.0esr-1~deb12u1","128.6.0esr-2","128.6.0esr-3","128.6.0esr-4","128.7.0esr-1","128.7.0esr-1~deb11u1","128.7.0esr-1~deb12u1","128.8.0esr-1","128.8.0esr-1~deb11u1","128.8.0esr-1~deb12u1","128.9.0esr-1","128.9.0esr-1~deb11u1","128.9.0esr-1~deb12u1","128.9.0esr-2","140.10.0esr-1","140.10.0esr-1~deb11u1","140.10.0esr-1~deb12u1","140.10.0esr-1~deb13u1","140.10.1esr-1","140.10.1esr-1~deb11u1","140.10.1esr-1~deb12u1","140.10.1esr-1~deb13u1","140.10.2esr-1","140.10.2esr-1~deb11u1","140.10.2esr-1~deb12u1","140.10.2esr-1~deb13u1","140.11.0esr-1","140.11.0esr-1~deb11u1","140.11.0esr-1~deb12u1","140.11.0esr-1~deb13u1","140.12.0esr-1","140.12.0esr-1~deb11u1","140.12.0esr-1~deb12u1","140.12.0esr-1~deb13u1","140.13.0esr-1","140.13.0esr-1~deb11u1","140.13.0esr-1~deb12u1","140.13.0esr-1~deb13u1","140.13.0esr-2","140.14.0esr-1~deb11u1","140.14.0esr-1~deb12u1","140.14.0esr-1~deb13u1","140.14.0esr-2","140.15.0esr-1","140.15.0esr-1~deb12u1","140.15.0esr-1~deb13u1","140.16.0esr-1","140.16.0esr-1~deb12u1","140.16.0esr-1~deb13u1","140.3.0esr-1","140.3.0esr-1~deb11u1","140.3.0esr-1~deb11u2","140.3.0esr-1~deb12u1","140.3.0esr-1~deb13u1","140.3.0esr-2","140.3.1esr-1","140.3.1esr-1~deb11u1","140.3.1esr-1~deb12u1","140.3.1esr-1~deb13u1","140.3.1esr-2","140.4.0esr-1","140.4.0esr-1~deb11u1","140.4.0esr-1~deb12u1","140.4.0esr-1~deb13u1","140.5.0esr-1","140.5.0esr-1~deb11u1","140.5.0esr-1~deb12u1","140.5.0esr-1~deb13u1","140.6.0esr-1","140.6.0esr-1~deb11u1","140.6.0esr-1~deb12u1","140.6.0esr-1~deb13u1","140.7.0esr-1","140.7.0esr-1~deb11u1","140.7.0esr-1~deb12u1","140.7.0esr-1~deb13u1","140.8.0esr-1","140.8.0esr-1~deb11u1","140.8.0esr-1~deb12u1","140.8.0esr-1~deb13u1","140.9.0esr-1","140.9.0esr-1~deb11u1","140.9.0esr-1~deb12u1","140.9.0esr-1~deb13u1","140.9.1esr-1","140.9.1esr-1~deb11u1","140.9.1esr-1~deb12u1","140.9.1esr-1~deb13u1","153.1.0esr-1","153.2.0esr-1","153.3.0esr-1"]},{"source":"osv","ecosystem":"Debian:13","package":"firefox-esr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["128.13.0esr-1","128.14.0esr-1","128.14.0esr-1~deb11u1","128.14.0esr-1~deb12u1","128.14.0esr-1~deb13u1","140.10.0esr-1","140.10.0esr-1~deb11u1","140.10.0esr-1~deb12u1","140.10.0esr-1~deb13u1","140.10.1esr-1","140.10.1esr-1~deb11u1","140.10.1esr-1~deb12u1","140.10.1esr-1~deb13u1","140.10.2esr-1","140.10.2esr-1~deb11u1","140.10.2esr-1~deb12u1","140.10.2esr-1~deb13u1","140.11.0esr-1","140.11.0esr-1~deb11u1","140.11.0esr-1~deb12u1","140.11.0esr-1~deb13u1","140.12.0esr-1","140.12.0esr-1~deb11u1","140.12.0esr-1~deb12u1","140.12.0esr-1~deb13u1","140.13.0esr-1","140.13.0esr-1~deb11u1","140.13.0esr-1~deb12u1","140.13.0esr-1~deb13u1","140.13.0esr-2","140.14.0esr-1~deb11u1","140.14.0esr-1~deb12u1","140.14.0esr-1~deb13u1","140.14.0esr-2","140.15.0esr-1","140.15.0esr-1~deb12u1","140.15.0esr-1~deb13u1","140.16.0esr-1","140.16.0esr-1~deb12u1","140.16.0esr-1~deb13u1","140.3.0esr-1","140.3.0esr-1~deb11u1","140.3.0esr-1~deb11u2","140.3.0esr-1~deb12u1","140.3.0esr-1~deb13u1","140.3.0esr-2","140.3.1esr-1","140.3.1esr-1~deb11u1","140.3.1esr-1~deb12u1","140.3.1esr-1~deb13u1","140.3.1esr-2","140.4.0esr-1","140.4.0esr-1~deb11u1","140.4.0esr-1~deb12u1","140.4.0esr-1~deb13u1","140.5.0esr-1","140.5.0esr-1~deb11u1","140.5.0esr-1~deb12u1","140.5.0esr-1~deb13u1","140.6.0esr-1","140.6.0esr-1~deb11u1","140.6.0esr-1~deb12u1","140.6.0esr-1~deb13u1","140.7.0esr-1","140.7.0esr-1~deb11u1","140.7.0esr-1~deb12u1","140.7.0esr-1~deb13u1","140.8.0esr-1","140.8.0esr-1~deb11u1","140.8.0esr-1~deb12u1","140.8.0esr-1~deb13u1","140.9.0esr-1","140.9.0esr-1~deb11u1","140.9.0esr-1~deb12u1","140.9.0esr-1~deb13u1","140.9.1esr-1","140.9.1esr-1~deb11u1","140.9.1esr-1~deb12u1","140.9.1esr-1~deb13u1","153.1.0esr-1","153.2.0esr-1","153.3.0esr-1"]},{"source":"osv","ecosystem":"Debian:14","package":"firefox-esr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["128.13.0esr-1","128.14.0esr-1","128.14.0esr-1~deb11u1","128.14.0esr-1~deb12u1","128.14.0esr-1~deb13u1","140.10.0esr-1","140.10.0esr-1~deb11u1","140.10.0esr-1~deb12u1","140.10.0esr-1~deb13u1","140.10.1esr-1","140.10.1esr-1~deb11u1","140.10.1esr-1~deb12u1","140.10.1esr-1~deb13u1","140.10.2esr-1","140.10.2esr-1~deb11u1","140.10.2esr-1~deb12u1","140.10.2esr-1~deb13u1","140.11.0esr-1","140.11.0esr-1~deb11u1","140.11.0esr-1~deb12u1","140.11.0esr-1~deb13u1","140.12.0esr-1","140.12.0esr-1~deb11u1","140.12.0esr-1~deb12u1","140.12.0esr-1~deb13u1","140.13.0esr-1","140.13.0esr-1~deb11u1","140.13.0esr-1~deb12u1","140.13.0esr-1~deb13u1","140.13.0esr-2","140.14.0esr-1~deb11u1","140.14.0esr-1~deb12u1","140.14.0esr-1~deb13u1","140.14.0esr-2","140.15.0esr-1","140.15.0esr-1~deb12u1","140.15.0esr-1~deb13u1","140.16.0esr-1","140.16.0esr-1~deb12u1","140.16.0esr-1~deb13u1","140.3.0esr-1","140.3.0esr-1~deb11u1","140.3.0esr-1~deb11u2","140.3.0esr-1~deb12u1","140.3.0esr-1~deb13u1","140.3.0esr-2","140.3.1esr-1","140.3.1esr-1~deb11u1","140.3.1esr-1~deb12u1","140.3.1esr-1~deb13u1","140.3.1esr-2","140.4.0esr-1","140.4.0esr-1~deb11u1","140.4.0esr-1~deb12u1","140.4.0esr-1~deb13u1","140.5.0esr-1","140.5.0esr-1~deb11u1","140.5.0esr-1~deb12u1","140.5.0esr-1~deb13u1","140.6.0esr-1","140.6.0esr-1~deb11u1","140.6.0esr-1~deb12u1","140.6.0esr-1~deb13u1","140.7.0esr-1","140.7.0esr-1~deb11u1","140.7.0esr-1~deb12u1","140.7.0esr-1~deb13u1","140.8.0esr-1","140.8.0esr-1~deb11u1","140.8.0esr-1~deb12u1","140.8.0esr-1~deb13u1","140.9.0esr-1","140.9.0esr-1~deb11u1","140.9.0esr-1~deb12u1","140.9.0esr-1~deb13u1","140.9.1esr-1","140.9.1esr-1~deb11u1","140.9.1esr-1~deb12u1","140.9.1esr-1~deb13u1","153.1.0esr-1","153.2.0esr-1","153.3.0esr-1"]}],"products":[{"vendor":"torproject","product":"tor_browser"}],"references":[{"url":"https://trac.torproject.org/projects/tor/ticket/24056","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://hackerone.com/reports/282748","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://gitweb.torproject.org/tor-browser.git/commit/?id=cbb04b72c68272c2de42f157d40cd7d29a6b7b55","tags":["x_refsource_MISC","x_transferred","Mailing List","Patch","Third Party Advisory","fix"]},{"url":"http://www.securityfocus.com/bid/108484","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12383"},{"url":"https://github.com/advisories/GHSA-9c7r-v445-c52r"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-12383","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2019-12383","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2019-05-28T02:21:05Z","modified":"2024-08-04T23:17:39.997Z","updated_at":"2026-11-02T14:20:23.697579Z"}],"euvd":[{"id":"EUVD-2019-4018","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2019-05-28T02:21:05Z","modified":"2024-08-04T23:17:39Z","updated_at":"2026-11-03T02:40:46.416719Z"}],"ghsa":[{"id":"GHSA-9c7r-v445-c52r","title":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to...","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2022-05-24T16:46:47Z","modified":"2023-03-24T18:30:19Z","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"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:54:23.567838Z"}],"nvd":[{"id":"CVE-2019-12383","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2019-05-28T03:29:00.513Z","modified":"2026-06-17T02:14:31.95Z","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-203"],"updated_at":"2026-11-02T14:05:14.729983Z"}],"osv":[{"id":"CVE-2019-12383","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2019-05-28T03:29:00.513Z","modified":"2026-03-15T22:26:54.767318Z","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"}],"updated_at":"2026-11-02T15:44:10.718934Z"},{"id":"DEBIAN-CVE-2019-12383","description":"Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a \"Don't send my language\" setting.","status":"published","published":"2019-05-28T03:29:00.513Z","modified":"2026-09-21T07:02:01.675866326Z","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"}],"updated_at":"2026-11-02T15:45:31.467893Z"}]}}