{"id":"CVE-2021-22138","aliases":["BIT-logstash-2021-22138","EUVD-2021-9289","GHSA-56cm-rmmq-hqpv"],"status":"published","title":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw...","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00459,"percentile":0.40098,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295"],"published":"2021-05-13T17:35:19Z","modified":"2026-10-24T10:30:21Z","fixes":[{"ecosystem":"Bitnami","package":"logstash","fixed_in":["6.8.15","7.12.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"logstash","ranges":[{"type":"SEMVER","events":[{"introduced":"6.4.0"},{"fixed":"6.8.15"},{"introduced":"7.0.0"},{"fixed":"7.12.0"}]}]}],"products":[{"vendor":"elastic","product":"elasticsearch"},{"vendor":"elastic","product":"logstash"}],"references":[{"url":"https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20210629-0001/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22138","tags":["web"]},{"url":"https://github.com/advisories/GHSA-56cm-rmmq-hqpv"}],"sources":{"cve":[{"id":"CVE-2021-22138","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2021-05-13T17:35:19Z","modified":"2024-08-03T18:30:24.012Z","cwes":["CWE-295"],"updated_at":"2026-11-02T14:32:58.028461Z"}],"euvd":[{"id":"EUVD-2021-9289","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2021-05-13T17:35:19Z","modified":"2024-08-03T18:30:24Z","updated_at":"2026-11-03T03:25:03.638882Z"}],"ghsa":[{"id":"GHSA-56cm-rmmq-hqpv","title":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw...","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2022-05-24T22:01:37Z","modified":"2023-01-30T05:04:59Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:47:10.094761Z"}],"nvd":[{"id":"CVE-2021-22138","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2021-05-13T18:15:09.077Z","modified":"2026-06-17T03:36:40.987Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:06:53.343329Z"}],"osv":[{"id":"CVE-2021-22138","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2021-05-13T18:15:09.077Z","modified":"2026-10-24T10:30:21.54400587Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"BIT-logstash-2021-22138","description":"In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.","status":"published","published":"2024-03-06T10:55:30.006Z","modified":"2026-09-08T08:48:09.364805166Z","updated_at":"2026-11-02T15:28:32.645004Z"}]}}