{"id":"CVE-2020-2252","aliases":["EUVD-2022-2778","GHSA-6fr3-286q-q3cr","RHSA-2020:4297","RHSA-2020:5102"],"status":"published","title":"Improper Validation of Certificate with Host Mismatch in Jenkins Mailer Plugin","description":"Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP 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Advisory","advisory","web","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2252","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelist/blob/16860a328d970faa6e4350b0fa446f64a52e52ca/2020/2xxx/CVE-2020-2252.json","tags":["web"]},{"url":"https://github.com/jenkinsci/mailer-plugin/commit/e1893c6d105669f134ee5c5212ef9f3944d7d00d","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6fr3-286q-q3cr"},{"url":"https://access.redhat.com/errata/RHSA-2020:4297","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1819663","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1853652","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1867099","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1874268","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1880454","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1880456","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1880460","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1886637","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_4297.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-16541","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-16541","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-16541","tags":["advisory"]},{"url":"https://jenkins.io/security/advisory/2019-11-21/#SECURITY-1106","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-2252","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-2252","tags":["advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2020/09/16/3","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-2254","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-2254","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2254","tags":["advisory"]},{"url":"https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1956","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-2255","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-2255","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2255","tags":["advisory"]},{"url":"https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1961","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-8564","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-8564","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8564","tags":["advisory"]},{"url":"https://github.com/kubernetes/kubernetes/issues/95622","tags":["article"]},{"url":"https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-14040","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-14040","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14040","tags":["advisory"]},{"url":"https://github.com/golang/go/issues/39491","tags":["article"]},{"url":"https://groups.google.com/forum/#!topic/golang-announce/bXVeAmGOqz0","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-14370","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-14370","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14370","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-15586","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1856953","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-15586","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15586","tags":["advisory"]},{"url":"https://groups.google.com/g/golang-announce/c/XZNfaiwgt2w/m/E6gHDs32AQAJ","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-16845","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-16845","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-16845","tags":["advisory"]},{"url":"https://groups.google.com/g/golang-announce/c/NyPIaucMgXo","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2020:5102","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_5102.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2020-2252","description":"Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.","status":"published","published":"2020-09-16T13:20:38Z","modified":"2024-08-04T07:01:41.144Z","updated_at":"2026-11-02T14:35:51.206854Z"}],"euvd":[{"id":"EUVD-2022-2778","description":"Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.","status":"published","published":"2020-09-16T13:20:38Z","modified":"2024-08-04T07:01:41Z","updated_at":"2026-11-03T03:08:10.371372Z"}],"ghsa":[{"id":"GHSA-6fr3-286q-q3cr","title":"Improper Validation of Certificate with Host Mismatch in Jenkins Mailer Plugin","description":"Jenkins Mailer Plugin prior to 1.32.1, 1.31.1, and 1.29.1 does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections.\n\nMailer Plugin 1.32.1, 1.31.1, and 1.29.1 validates the SMTP hostname when connecting via TLS by default. In Mailer Plugin 1.32 and earlier, administrators can set the Java system property mail.smtp.ssl.checkserveridentity to true on startup to enable this protection.\n\nIn case of problems, this protection can be disabled again by setting the Java system property mail.smtp.ssl.checkserveridentity to false on startup.","status":"published","published":"2022-05-24T17:28:25Z","modified":"2023-12-14T09:11:13Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:37:26.012325Z"}],"nvd":[{"id":"CVE-2020-2252","description":"Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.","status":"published","published":"2020-09-16T14:15:13Z","modified":"2026-06-17T03:12:04.693Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/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-295"],"updated_at":"2026-11-02T14:06:14.981587Z"}],"osv":[{"id":"CVE-2020-2252","description":"Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.","status":"published","published":"2020-09-16T14:15:13Z","modified":"2026-10-24T10:30:36.805028525Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:15.534837Z"},{"id":"GHSA-6fr3-286q-q3cr","title":"Improper Validation of Certificate with Host Mismatch in Jenkins Mailer Plugin","description":"Jenkins Mailer Plugin prior to 1.32.1, 1.31.1, and 1.29.1 does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections.\n\nMailer Plugin 1.32.1, 1.31.1, and 1.29.1 validates the SMTP hostname when connecting via TLS by default. In Mailer Plugin 1.32 and earlier, administrators can set the Java system property mail.smtp.ssl.checkserveridentity to true on startup to enable this protection.\n\nIn case of problems, this protection can be disabled again by setting the Java system property mail.smtp.ssl.checkserveridentity to false on startup.","status":"published","published":"2022-05-24T17:28:25Z","modified":"2024-02-16T08:01:18.19238Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:46:39.618611Z"},{"id":"RHSA-2020:4297","title":"Red Hat Security Advisory: OpenShift Container Platform 4.6.1 package security update","status":"published","published":"2024-09-30T13:54:04Z","modified":"2026-10-14T10:01:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:07.57369Z"},{"id":"RHSA-2020:5102","title":"Red Hat Security Advisory: OpenShift Container Platform 3.11.318 jenkins-2-plugins security update","status":"published","published":"2024-09-16T04:55:47Z","modified":"2025-11-22T12:12:49Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:53:07.57369Z"}]}}