{"id":"CVE-2021-31866","aliases":["BIT-redmine-2021-31866","DEBIAN-CVE-2021-31866","DLA-2658-1","EUVD-2021-18741","GHSA-gv7v-mp3w-gfvh","UBUNTU-CVE-2021-31866"],"status":"published","title":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal...","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01226,"percentile":0.6924,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203"],"published":"2021-04-28T06:16:31Z","modified":"2026-10-24T10:30:38Z","fixes":[{"ecosystem":"Bitnami","package":"redmine","fixed_in":["4.0.9","4.1.3"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"redmine","fixed_in":["5.0.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"redmine","fixed_in":["5.0.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"redmine","fixed_in":["5.0.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"redmine","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.0.9"},{"introduced":"4.1.0"},{"fixed":"4.1.3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.0-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.1-4+deb9u4"}]}],"versions":["3.3.1-4","3.3.1-4+deb9u1","3.3.1-4+deb9u2","3.3.1-4+deb9u3"],"bundled":10},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0~20140825-8","3.2.0-1","3.2.0-3","3.2.1-1","3.2.1-2","3.2.1-2ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.1-4","3.4.2-1","3.4.4-1","3.4.4-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"redmine","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.4-1","4.0.4-3","4.0.6-2"]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"redmine","product":"redmine"}],"references":[{"url":"https://www.redmine.org/projects/redmine/wiki/Security_Advisories","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://www.redmine.org/news/131","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00013.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31866","tags":["web"]},{"url":"https://github.com/advisories/GHSA-gv7v-mp3w-gfvh"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-31866","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-31866","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-31866","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T06:16:31Z","modified":"2024-08-03T23:10:30.823Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18741","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T06:16:31Z","modified":"2024-08-03T23:10:30Z","updated_at":"2026-11-03T03:24:37.97373Z"}],"ghsa":[{"id":"GHSA-gv7v-mp3w-gfvh","title":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal...","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2022-05-24T17:49:04Z","modified":"2024-04-04T03:06:44Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:56:13.784244Z"}],"nvd":[{"id":"CVE-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T07:15:07.663Z","modified":"2026-06-17T03:52:22.387Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"CVE-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T07:15:07.663Z","modified":"2026-10-24T10:30:38.868221487Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T07:15:07.663Z","modified":"2026-10-23T18:03:26.570516964Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2021-04-28T07:15:00Z","modified":"2025-10-24T04:50:19Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:27.332852Z"},{"id":"BIT-redmine-2021-31866","description":"Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.","status":"published","published":"2024-03-06T11:04:43.596Z","modified":"2026-09-08T08:48:19.17577864Z","updated_at":"2026-11-02T15:28:35.111822Z"},{"id":"DLA-2658-1","title":"redmine - security update","status":"published","published":"2021-05-13T00:00:00Z","modified":"2026-03-09T01:20:01.950323Z","updated_at":"2026-11-02T15:46:10.712745Z"}]}}