{"id":"CVE-2021-23018","aliases":["EUVD-2021-10136","GHSA-gc3v-3qpp-57w4"],"status":"published","title":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before...","description":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00544,"percentile":0.46113,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-319"],"published":"2021-06-01T11:51:20Z","modified":"2026-06-17T03:38:13Z","products":[{"vendor":"f5","product":"nginx_controller"}],"references":[{"url":"https://support.f5.com/csp/article/K97002210","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23018"},{"url":"https://github.com/advisories/GHSA-gc3v-3qpp-57w4"}],"sources":{"cve":[{"id":"CVE-2021-23018","description":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.","status":"published","published":"2021-06-01T11:51:20Z","modified":"2024-08-03T18:58:26.256Z","cwes":["CWE-319"],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2021-10136","description":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.","status":"published","published":"2021-06-01T11:51:20Z","modified":"2024-08-03T18:58:26Z","updated_at":"2026-11-03T03:25:00.591933Z"}],"ghsa":[{"id":"GHSA-gc3v-3qpp-57w4","title":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before...","description":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.","status":"published","published":"2022-05-24T19:03:49Z","modified":"2023-01-29T05:07:48Z","cwes":["CWE-319"],"updated_at":"2026-11-02T14:46:11.123221Z"}],"nvd":[{"id":"CVE-2021-23018","description":"Intra-cluster communication does not use TLS. The services within the NGINX Controller 3.x before 3.4.0 namespace are using cleartext protocols inside the cluster.","status":"published","published":"2021-06-01T12:15:07.72Z","modified":"2026-06-17T03:38:13.323Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","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-319"],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}