{"id":"CVE-2021-29957","aliases":["ALPINE-CVE-2021-29957","DEBIAN-CVE-2021-29957","DLA-2679-1","DSA-4927-1","EUVD-2021-16416","GHSA-5v9p-7pr9-r9pm","MGASA-2021-0217","RHSA-2021:2261","RHSA-2021:2262","RHSA-2021:2263","RHSA-2021:2264","RLSA-2021:2264","SUSE-SU-2021:1854-1","UBUNTU-CVE-2021-29957","USN-4995-1","USN-4995-2","openSUSE-SU-2021:1854-1","openSUSE-SU-2024:10601-1"],"status":"published","title":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also...","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.0094,"percentile":0.61367,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2021-05-21T22:47:24Z","modified":"2026-11-03T06:32:39Z","fixes":[{"ecosystem":"Alpine:v3.16","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"thunderbird","fixed_in":["1:78.10.2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"thunderbird","fixed_in":["1:78.10.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"thunderbird","fixed_in":["1:78.10.2-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","fixed_in":["1:78.11.0+build1-0ubuntu0.18.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"thunderbird","fixed_in":["1:78.11.0+build1-0ubuntu0.20.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.16","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.2-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.2-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.11.0-1~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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a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T13:16:54Z","modified":"2024-08-03T22:18:03.504Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-16416","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T13:16:54Z","modified":"2024-08-03T22:18:03Z","updated_at":"2026-11-03T03:24:43.413555Z"}],"ghsa":[{"id":"GHSA-5v9p-7pr9-r9pm","title":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also...","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2022-05-24T19:06:08Z","modified":"2023-01-29T05:07:07Z","updated_at":"2026-11-02T14:46:09.170985Z"}],"nvd":[{"id":"CVE-2021-29957","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T14:15:10.11Z","modified":"2026-06-17T03:48:30.56Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:54.892562Z"}],"osv":[{"id":"ALPINE-CVE-2021-29957","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T14:15:10.11Z","modified":"2026-11-03T06:32:39.175299396Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:20.312441Z"},{"id":"CVE-2021-29957","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T14:15:10.11Z","modified":"2026-04-16T04:34:55.744911656Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-29957","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-06-24T14:15:10.11Z","modified":"2026-10-23T18:03:12.737491242Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"RHSA-2021:2261","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:01:22Z","modified":"2025-11-22T12:21:20Z","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":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2262","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:01:36Z","modified":"2025-11-22T12:21:21Z","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":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2263","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:01:43Z","modified":"2026-06-26T10:54:39Z","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":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2264","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:01:29Z","modified":"2025-11-22T12:21:22Z","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":"2026-11-02T15:53:08.619234Z"},{"id":"RLSA-2021:2264","title":"Important: thunderbird security update","description":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nThis update upgrades Thunderbird to version 78.11.0.\n\nSecurity Fix(es):\n\n* Mozilla: Memory safety bugs fixed in Firefox 89 and Firefox ESR 78.11 (CVE-2021-29967)\n\n* Mozilla: Thunderbird stored OpenPGP secret keys without master password protection (CVE-2021-29956)\n\n* Mozilla: Partial protection of inline OpenPGP message not indicated (CVE-2021-29957)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2021-06-07T11:20:44Z","modified":"2026-02-05T03:45:13.593389Z","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":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2021-29957","description":"If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird \u003c 78.10.2.","status":"published","published":"2021-05-28T00:00:00Z","modified":"2026-04-22T12:51:49.7399Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"DLA-2679-1","title":"thunderbird - security update","status":"published","published":"2021-06-07T00:00:00Z","modified":"2026-03-09T01:21:23.337364Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DSA-4927-1","title":"thunderbird - security update","status":"published","published":"2021-06-05T00:00:00Z","modified":"2026-03-09T02:09:24.188481Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2021-0217","title":"Updated thunderbird packages fix security vulnerabilities","description":"The updated packages fix security vulnerabilities:\n\nThunderbird stored OpenPGP secret keys without master password\nprotection (CVE-2021-29956).\n\nPartial protection of inline OpenPGP message not indicated\n(CVE-2021-29957).\n","status":"published","published":"2021-05-21T22:47:24Z","modified":"2026-04-16T04:42:05.176836136Z","updated_at":"2026-11-02T15:49:41.509337Z"},{"id":"openSUSE-SU-2021:1854-1","title":"Security update for MozillaThunderbird","description":"This update for MozillaThunderbird fixes the following issues:\n\n- Mozilla Thunderbird 78.10.2\n- CVE-2021-29957: Fixed partial protection of inline OpenPGP message not indicated (bsc#1186198).\n- CVE-2021-29956: Fixed Thunderbird stored OpenPGP secret keys without master password protection (bsc#1186199).\n- CVE-2021-29951: Fixed Thunderbird Maintenance Service could have been started or stopped by domain users (bsc#1185633).\n- CVE-2021-29950: Fixed logic issue potentially leaves key material unlocked (bsc#1185086).\n","status":"published","published":"2021-07-10T17:54:23Z","modified":"2026-02-04T02:38:26.923307Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2024:10601-1","title":"MozillaThunderbird-91.1.1-1.1 on GA media","description":"These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:08:23.188336Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2021:1854-1","title":"Security update for MozillaThunderbird","description":"This update for MozillaThunderbird fixes the following issues:\n\n- Mozilla Thunderbird 78.10.2\n- CVE-2021-29957: Fixed partial protection of inline OpenPGP message not indicated (bsc#1186198).\n- CVE-2021-29956: Fixed Thunderbird stored OpenPGP secret keys without master password protection (bsc#1186199).\n- CVE-2021-29951: Fixed Thunderbird Maintenance Service could have been started or stopped by domain users (bsc#1185633).\n- CVE-2021-29950: Fixed logic issue potentially leaves key material unlocked (bsc#1185086).\n","status":"published","published":"2021-06-04T06:54:13Z","modified":"2026-02-04T04:34:42.697343Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"USN-4995-1","title":"thunderbird vulnerabilities","description":"Multiple security issues were discovered in Thunderbird. If a user were\ntricked into opening a specially crafted website in a browsing context, an\nattacker could potentially exploit these to cause a denial of service,\nobtain sensitive information, spoof the UI, bypass security restrictions,\nor execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,\nCVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,\nCVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)\n\nIt was discovered that extensions could open popup windows with control\nof the window title in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to spoof a website and trick the user into providing\ncredentials. (CVE-2021-23984)\n\nMultiple security issues were discovered in Thunderbird's OpenPGP\nintegration. If a user were tricked into importing a specially crafted\nkey in some circumstances, an attacker could potentially exploit this\nto cause a denial of service (inability to send encrypted email) or\nconfuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)\n\nA use-after-free was discovered when Responsive Design Mode was\nenabled. If a user were tricked into opening a specially crafted\nwebsite with Responsive Design Mode enabled, an attacker could\npotentially exploit this to cause a denial of service, or execute\narbitrary code. (CVE-2021-23995)\n\nIt was discovered that Thunderbird mishandled ftp URLs with encoded\nnewline characters. If a user were tricked into clicking on a specially\ncrafted link, an attacker could potentially exploit this to send arbitrary\nFTP commands. (CVE-2021-24002)\n\nIt was discovered that Thunderbird wrote signatures to disk and read them\nback during verification. A local attacker could potentially exploit this\nto replace the data with another signature file. (CVE-2021-29948)\n\nIt was discovered that Thunderbird might load an alternative OTR\nlibrary. If a user were tricked into copying a specially crafted\nlibrary to one of Thunderbird's search paths, an attacker could\npotentially exploit this to execute arbitrary code. (CVE-2021-29949)\n\nIt was discovered that secret keys imported into Thunderbird were\nstored unencrypted. A local attacker could potentially exploit this to\nobtain private keys. (CVE-2021-29956)\n\nIt was discovered that Thunderbird did not indicate when an inline signed\nor encrypted message contained additional unprotected parts.\n(CVE-2021-29957)\n","status":"published","published":"2021-06-22T16:43:02Z","modified":"2026-04-22T10:15:28.673707Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-4995-2","title":"thunderbird vulnerabilities","description":"USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides\nthe corresponding updates for Ubuntu 18.04 LTS.\n\nOriginal advisory details:\n\n Multiple security issues were discovered in Thunderbird. If a user were\n tricked into opening a specially crafted website in a browsing context, an\n attacker could potentially exploit these to cause a denial of service,\n obtain sensitive information, spoof the UI, bypass security restrictions,\n or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,\n CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,\n CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)\n \n It was discovered that extensions could open popup windows with control\n of the window title in some circumstances. If a user were tricked into\n installing a specially crafted extension, an attacker could potentially\n exploit this to spoof a website and trick the user into providing\n credentials. (CVE-2021-23984)\n \n Multiple security issues were discovered in Thunderbird's OpenPGP\n integration. If a user were tricked into importing a specially crafted\n key in some circumstances, an attacker could potentially exploit this\n to cause a denial of service (inability to send encrypted email) or\n confuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)\n \n A use-after-free was discovered when Responsive Design Mode was\n enabled. If a user were tricked into opening a specially crafted\n website with Responsive Design Mode enabled, an attacker could\n potentially exploit this to cause a denial of service, or execute\n arbitrary code. (CVE-2021-23995)\n \n It was discovered that Thunderbird mishandled ftp URLs with encoded\n newline characters. If a user were tricked into clicking on a specially\n crafted link, an attacker could potentially exploit this to send arbitrary\n FTP commands. (CVE-2021-24002)\n \n It was discovered that Thunderbird wrote signatures to disk and read them\n back during verification. A local attacker could potentially exploit this\n to replace the data with another signature file. (CVE-2021-29948)\n \n It was discovered that Thunderbird might load an alternative OTR\n library. If a user were tricked into copying a specially crafted\n library to one of Thunderbird's search paths, an attacker could\n potentially exploit this to execute arbitrary code. (CVE-2021-29949)\n \n It was discovered that secret keys imported into Thunderbird were\n stored unencrypted. A local attacker could potentially exploit this to\n obtain private keys. (CVE-2021-29956)\n \n It was discovered that Thunderbird did not indicate when an inline signed\n or encrypted message contained additional unprotected parts.\n (CVE-2021-29957)\n","status":"published","published":"2021-06-25T14:44:38Z","modified":"2026-04-22T10:16:05.579337Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}