{"id":"CVE-2019-17019","aliases":["EUVD-2019-7493","GHSA-r75w-mj28-6x5x","UBUNTU-CVE-2019-17019"],"status":"published","title":"When Python was installed on Windows, a python file being served with the MIME type of text/plain...","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01046,"percentile":0.6441,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2020-01-08T21:28:47Z","modified":"2026-06-17T02:23:10Z","affected":[{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mozjs52","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.3.1-0ubuntu3","52.3.1-7fakesync1","52.8.1-0ubuntu0.18.04.1","52.9.1-0ubuntu0.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mozjs38","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["38.8.0~repack1-0ubuntu1","38.8.0~repack1-0ubuntu3","38.8.0~repack1-0ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mozjs52","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.9.1-1build1","52.9.1-1ubuntu3"]}],"products":[{"vendor":"mozilla","product":"firefox"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1568003","tags":["x_refsource_MISC","x_transferred","Permissions Required","report"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-01/","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-17019"},{"url":"https://github.com/advisories/GHSA-r75w-mj28-6x5x"},{"url":"https://ubuntu.com/security/CVE-2019-17019","tags":["report"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/#CVE-2019-17019","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-17019","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-17019","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","status":"published","published":"2020-01-08T21:28:47Z","modified":"2024-08-05T01:24:48.672Z","updated_at":"2026-11-02T14:20:24.678649Z"}],"euvd":[{"id":"EUVD-2019-7493","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","status":"published","published":"2020-01-08T21:28:47Z","modified":"2024-08-05T01:24:48Z","updated_at":"2026-11-03T02:40:31.468839Z"}],"ghsa":[{"id":"GHSA-r75w-mj28-6x5x","title":"When Python was installed on Windows, a python file being served with the MIME type of text/plain...","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","status":"published","published":"2022-05-24T17:05:49Z","modified":"2023-01-29T05:00:59Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:44:42.615019Z"}],"nvd":[{"id":"CVE-2019-17019","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","status":"published","published":"2020-01-08T22:15:12.497Z","modified":"2026-06-17T02:23:10.117Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:05:42.416368Z"}],"osv":[{"id":"UBUNTU-CVE-2019-17019","description":"When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 72.","status":"published","published":"2020-01-08T22:15:00Z","modified":"2026-04-22T12:13:34.863143Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:20.325378Z"}]}}