{"id":"CVE-2021-37746","aliases":["DEBIAN-CVE-2021-37746","EUVD-2021-24227","GHSA-7cx5-4rpx-pcm3","MGASA-2021-0408","UBUNTU-CVE-2021-37746"],"status":"published","title":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0...","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01164,"percentile":0.67723,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-601"],"published":"2021-07-30T13:17:32Z","modified":"2026-10-23T18:03:38Z","fixes":[{"ecosystem":"Debian:12","package":"claws-mail","fixed_in":["3.18.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"claws-mail","fixed_in":["3.18.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"claws-mail","fixed_in":["3.18.0-1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"sylpheed","fixed_in":["3.8.0~beta1-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"sylpheed","fixed_in":["3.8.0~beta1-2+deb13u1"],"sources":["osv"]},{"ecosystem":"Mageia:8","package":"claws-mail","fixed_in":["3.18.0-1.mga8"],"sources":["osv"]},{"ecosystem":"Mageia:8","package":"sylpheed","fixed_in":["3.7.0-4.1.mga8"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.0-1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.0~beta1-1+deb12u1"}]}],"versions":["3.8.0~beta1-1"]},{"source":"osv","ecosystem":"Debian:13","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.0~beta1-2+deb13u1"}]}],"versions":["3.8.0~beta1-2"]},{"source":"osv","ecosystem":"Mageia:8","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18.0-1.mga8"}]}]},{"source":"osv","ecosystem":"Mageia:8","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.0-4.1.mga8"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.12.0-1ubuntu1","3.12.0-1ubuntu2","3.13.1-1.1ubuntu1","3.13.1-1.1ubuntu2","3.13.1-1.1ubuntu3","3.13.2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.2-0ubuntu1","3.5.0~rc2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.15.0-2build2","3.15.1-1","3.15.1-1ubuntu1","3.16.0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.1-1ubuntu2","3.5.1-1ubuntu3","3.5.1-1ubuntu3.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.17.4-1","3.17.4-1build1","3.17.4-2build2","3.17.4-2ubuntu1","3.17.5-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.1-1ubuntu5","3.7.0-6ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.17.8-1build2","3.18.0-1","4.0.0-2","4.0.0-2build1","4.0.0-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.0-8ubuntu2","3.7.0-8ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.1-4","4.1.1-4build1","4.2.0-1","4.2.0-1ubuntu1","4.2.0-2","4.2.0-2build6","4.2.0-2build7"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.0~beta1-1ubuntu1","3.8.0~beta1-1ubuntu4","3.8.0~beta1-1ubuntu5"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"sylpheed","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.0~beta1-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-1ubuntu1","4.4.0-1","4.4.0-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"claws-mail","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-1","4.3.1-1build1","4.3.1-1build2","4.3.1-1ubuntu1"]}],"products":[{"vendor":"claws-mail","product":"claws-mail"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"sylpheed_project","product":"sylpheed"}],"references":[{"url":"https://git.claws-mail.org/?p=claws.git%3Ba=commit%3Bh=ac286a71ed78429e16c612161251b9ea90ccd431","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://sylpheed.sraoss.jp/sylpheed/v3.7/sylpheed-3.7.0.tar.xz","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://claws-mail.org/download.php?file=releases/claws-mail-3.18.0.tar.xz","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L2QNUIWASJLPUZZKWICGCEGYJZCQE7NH/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RCJXHUSYHGVBSH2ULD7HNXLM7QNRECZ6/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37746"},{"url":"https://git.claws-mail.org/?p=claws.git;a=commit;h=ac286a71ed78429e16c612161251b9ea90ccd431","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L2QNUIWASJLPUZZKWICGCEGYJZCQE7NH/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RCJXHUSYHGVBSH2ULD7HNXLM7QNRECZ6/"},{"url":"https://github.com/advisories/GHSA-7cx5-4rpx-pcm3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-37746","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2021-0408.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29356","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/RCJXHUSYHGVBSH2ULD7HNXLM7QNRECZ6/","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-37746","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-37746","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-37746","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T13:17:32Z","modified":"2024-08-04T01:30:07.555Z","updated_at":"2026-11-02T14:32:58.359368Z"}],"euvd":[{"id":"EUVD-2021-24227","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T13:17:32Z","modified":"2024-08-04T01:30:07Z","updated_at":"2026-11-03T03:24:26.118239Z"}],"ghsa":[{"id":"GHSA-7cx5-4rpx-pcm3","title":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0...","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2022-05-24T19:09:19Z","modified":"2023-01-30T05:01:11Z","cwes":["CWE-601"],"updated_at":"2026-11-02T14:46:21.093669Z"}],"nvd":[{"id":"CVE-2021-37746","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T15:15:09.333Z","modified":"2026-06-17T04:01:05.807Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-601"],"updated_at":"2026-11-02T14:06:56.185362Z"}],"osv":[{"id":"CVE-2021-37746","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T15:15:09.333Z","modified":"2026-04-16T04:41:44.264478115Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:20.434873Z"},{"id":"DEBIAN-CVE-2021-37746","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T15:15:09.333Z","modified":"2026-10-23T18:03:38.230568107Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"UBUNTU-CVE-2021-37746","description":"textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks before accepting a click.","status":"published","published":"2021-07-30T15:15:00Z","modified":"2026-10-17T12:57:13.664993115Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:28.526929Z"},{"id":"MGASA-2021-0408","title":"Updated sylpheed and claws-mail packages fix security vulnerability","description":"Updated sylpheed and claws-mail packages fix security vulnerability:\n\nThe textview_uri_security_check() function in textview.c in Claws Mail before\n3.18.0, and Sylpheed through 3.7.0, does not have sufficient link checks\nbefore accepting a click (CVE-2021-37746).\n","status":"published","published":"2021-08-15T08:38:04Z","modified":"2026-04-16T04:42:02.517083836Z","updated_at":"2026-11-02T15:49:41.849028Z"}]}}