{"id":"CVE-2020-15646","aliases":["DEBIAN-CVE-2020-15646","DSA-4718-1","EUVD-2020-7633","GHSA-4w45-xx62-4547","RHSA-2020:2906","RHSA-2020:2907","RHSA-2020:2966","RHSA-2020:3038","RHSA-2020:3046","UBUNTU-CVE-2020-15646"],"status":"published","title":"If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using...","description":"If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using the Microsoft Exchange autodiscovery mechanism, and the attacker sends a crafted response, then Thunderbird sends username and password over https to a server controlled by the attacker. This vulnerability affects Thunderbird \u003c 68.10.0.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00961,"percentile":0.61829,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-522"],"published":"2020-07-05T00:00:00Z","modified":"2026-10-26T12:02:26Z","fixes":[{"ecosystem":"Debian:12","package":"thunderbird","fixed_in":["1:68.10.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"thunderbird","fixed_in":["1:68.10.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"thunderbird","fixed_in":["1:68.10.0-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"thunderbird","fixed_in":["1:68.10.0+build1-0ubuntu0.16.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","fixed_in":["1:68.10.0+build1-0ubuntu0.18.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"thunderbird","fixed_in":["1:68.10.0+build1-0ubuntu0.20.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.10.0-1~deb9u1"}]}],"versions":["1.5-4","1.5.0.2-1","1.5.0.2-2","1.5.0.2-3","1.5.0.4-1","1.5.0.4-2","1.5.0.4-3","1.5.0.5-1","1.5.0.7-1","1.5.0.7-2","1:52.4.0-1","1:52.4.0-1~deb7u1","1:52.4.0-1~deb8u1","1:52.4.0-1~deb9u1","1:52.4.0-2~exp1","1:52.5.0-1","1:52.5.0-1~deb7u1","1:52.5.0-1~deb8u1","1:52.5.0-1~deb9u1","1:52.5.2-1","1:52.5.2-1~deb7u1","1:52.5.2-2","1:52.5.2-2~deb8u1","1:52.5.2-2~deb9u1","1:52.6.0-1","1:52.6.0-1+alpha.1","1:52.6.0-1+alpha.2","1:52.6.0-1~deb7u1","1:52.6.0-1~deb8u1","1:52.6.0-1~deb9u1","1:52.7.0-1","1:52.7.0-1~deb7u1","1:52.7.0-1~deb8u1","1:52.7.0-1~deb9u1","1:52.8.0-1","1:52.8.0-1~deb7u1","1:52.8.0-1~deb8u1","1:52.8.0-1~deb9u1","1:52.9.0-1","1:52.9.1-1","1:52.9.1-1~deb8u1","1:52.9.1-1~deb9u1","1:58.0~b3-1","1:60.0-1","1:60.0-2","1:60.0-2~deb9u1","1:60.0-3","1:60.0-3~deb9u1","1:60.0~b10-1","1:60.0~b2-1","1:60.0~b3-1","1:60.0~b4-1","1:60.0~b5-1","1:60.0~b6-1","1:60.0~b9-1","1:60.0~b9-2","1:60.2.1-1","1:60.2.1-2~deb9u1","1:60.3.0-1","1:60.3.0-1~deb8u1","1:60.3.0-1~deb9u1","1:60.3.1-1","1:60.4.0-1","1:60.4.0-1~deb8u1","1:60.4.0-1~deb9u1","1:60.5.0-1","1:60.5.0-2","1:60.5.0-3","1:60.5.1-1","1:60.5.1-1~deb8u1","1:60.5.1-1~deb9u1","1:60.6.1-1","1:60.6.1-1~deb8u1","1:60.6.1-1~deb9u1","1:60.7.0-1","1:60.7.0-1~deb8u1","1:60.7.0-1~deb9u1","1:60.7.1-1","1:60.7.1-1~deb8u1","1:60.7.1-1~deb9u1","1:60.7.2-1","1:60.7.2-1~deb8u1","1:60.7.2-1~deb9u1","1:60.8.0-1","1:60.8.0-1~deb10u1","1:60.8.0-1~deb8u1","1:60.8.0-1~deb9u1","1:60.8.0-2","1:60.9.0-1","1:60.9.0-1~deb10u1","1:60.9.0-1~deb8u1","1:60.9.0-1~deb9u1","1:65.0~b1-1","1:66.0~b1-1","1:67.0~b3-1","1:68.0~b1-1","1:68.1.1-1~exp1","1:68.1.2-1~exp1","1:68.2.1-1","1:68.2.2-1","1:68.2.2-1~deb10u1","1:68.2.2-1~deb8u1","1:68.2.2-1~deb9u1","1:68.3.0-1","1:68.3.0-2","1:68.3.0-2~deb10u1","1:68.3.0-2~deb8u1","1:68.3.0-2~deb9u1","1:68.3.1-1","1:68.4.1-1","1:68.4.1-1~deb10u1","1:68.4.1-1~deb8u1","1:68.4.1-1~deb9u1","1:68.4.2-1","1:68.5.0-1","1:68.5.0-1~deb10u1","1:68.5.0-1~deb8u1","1:68.5.0-1~deb9u1","1:68.6.0-1","1:68.6.0-1~deb10u1","1:68.6.0-1~deb8u1","1:68.6.0-1~deb9u1","1:68.7.0-1","1:68.7.0-1~deb10u1","1:68.7.0-1~deb8u1","1:68.7.0-1~deb9u1","1:68.8.0-1","1:68.8.0-1~deb10u1","1:68.8.0-1~deb8u1","1:68.8.0-1~deb9u1","1:68.8.1-1","1:68.9.0-1","1:68.9.0-1~deb10u1","1:68.9.0-1~deb8u1","1:68.9.0-1~deb8u2","1:68.9.0-1~deb9u1"],"bundled":6},{"source":"osv","ecosystem":"Debian:10","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.10.0-1~deb10u1"}]}],"versions":["1:60.7.2-1","1:60.8.0-1","1:60.8.0-1~deb10u1","1:60.8.0-1~deb8u1","1:60.8.0-1~deb9u1","1:60.8.0-2","1:60.9.0-1","1:60.9.0-1~deb10u1","1:60.9.0-1~deb8u1","1:60.9.0-1~deb9u1","1:65.0~b1-1","1:66.0~b1-1","1:67.0~b3-1","1:68.0~b1-1","1:68.1.1-1~exp1","1:68.1.2-1~exp1","1:68.10.0-1~deb9u1","1:68.2.1-1","1:68.2.2-1","1:68.2.2-1~deb10u1","1:68.2.2-1~deb8u1","1:68.2.2-1~deb9u1","1:68.3.0-1","1:68.3.0-2","1:68.3.0-2~deb10u1","1:68.3.0-2~deb8u1","1:68.3.0-2~deb9u1","1:68.3.1-1","1:68.4.1-1","1:68.4.1-1~deb10u1","1:68.4.1-1~deb8u1","1:68.4.1-1~deb9u1","1:68.4.2-1","1:68.5.0-1","1:68.5.0-1~deb10u1","1:68.5.0-1~deb8u1","1:68.5.0-1~deb9u1","1:68.6.0-1","1:68.6.0-1~deb10u1","1:68.6.0-1~deb8u1","1:68.6.0-1~deb9u1","1:68.7.0-1","1:68.7.0-1~deb10u1","1:68.7.0-1~deb8u1","1:68.7.0-1~deb9u1","1:68.8.0-1","1:68.8.0-1~deb10u1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an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using the Microsoft Exchange autodiscovery mechanism, and the attacker sends a crafted response, then Thunderbird sends username and password over https to a server controlled by the attacker. This vulnerability affects Thunderbird \u003c 68.10.0.","status":"published","published":"2020-10-08T13:37:18Z","modified":"2024-08-04T13:22:30.834Z","updated_at":"2026-11-02T14:35:50.545879Z"}],"euvd":[{"id":"EUVD-2020-7633","description":"If an attacker intercepts Thunderbird's initial attempt to perform automatic account setup using the Microsoft Exchange autodiscovery mechanism, and the attacker sends a crafted response, then Thunderbird sends username and password over https to a server controlled by the attacker. 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