{"id":"CVE-2025-12969","aliases":["AZL-71077","AZL-71108","BIT-fluent-bit-2025-12969","EUVD-2025-198808","GHSA-2949-r76x-4vc4"],"status":"published","title":"CVE-2025-12969","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00631,"percentile":0.50514,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-306"],"published":"2025-11-24T14:41:05Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure Linux:2","package":"fluent-bit","fixed_in":["3.0.6-6"],"sources":["osv"]},{"ecosystem":"Azure Linux:3","package":"fluent-bit","fixed_in":["3.1.10-4"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"fluent-bit","fixed_in":["4.1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:2","package":"fluent-bit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.6-6"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"fluent-bit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.10-4"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"fluent-bit","ranges":[{"type":"SEMVER","events":[{"introduced":"4.1.0"},{"fixed":"4.1.1"}]}]}],"products":[{"vendor":"fluentbit","product":"fluent bit"},{"vendor":"treasuredata","product":"fluent_bit"}],"references":[{"url":"https://fluentbit.io/blog/2025/10/28/security-vulnerabilities-addressed-in-fluent-bit-v4.1-and-backported-to-v4.0/","tags":["web","article"]},{"url":"https://www.oligo.security/blog/critical-vulnerabilities-in-fluent-bit-expose-cloud-environments-to-remote-takeover","tags":["web","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12969","tags":["web","advisory"]},{"url":"https://fluentbit.io/announcements/v4.1.0"},{"url":"https://fluentbit.io/blog/2025/10/28/security-vulnerabilities-addressed-in-fluent-bit-v4.1-and-backported-to-v4.0"},{"url":"https://github.com/advisories/GHSA-2949-r76x-4vc4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12969.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-12969","title":"CVE-2025-12969","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T14:41:05.63Z","modified":"2026-01-07T15:36:49.065Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"updated_at":"2026-11-02T14:32:41.743125Z"}],"euvd":[{"id":"EUVD-2025-198808","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T14:41:05Z","modified":"2026-01-07T15:36:49Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:48:55.108559Z"}],"ghsa":[{"id":"GHSA-2949-r76x-4vc4","title":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication...","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T15:30:29Z","modified":"2025-11-28T18:31:27Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:04:59.128724Z"}],"nvd":[{"id":"CVE-2025-12969","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T15:15:46.38Z","modified":"2026-10-08T10:10:00.227Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:11:46.009629Z"}],"osv":[{"id":"CVE-2025-12969","title":"CVE-2025-12969","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T14:41:05.63Z","modified":"2026-10-28T02:30:30.807657527Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:46.024537Z"},{"id":"AZL-71077","title":"CVE-2025-12969 affecting package fluent-bit for versions less than 3.0.6-6","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T15:15:46Z","modified":"2026-04-21T04:36:31.421692Z","updated_at":"2026-11-02T15:28:08.907584Z"},{"id":"AZL-71108","title":"CVE-2025-12969 affecting package fluent-bit for versions less than 3.1.10-4","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-11-24T15:15:46Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:24.144367Z"},{"id":"BIT-fluent-bit-2025-12969","title":"CVE-2025-12969","description":"Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain configuration conditions. This allows remote attackers with network access to the Fluent Bit instance exposing the forward input to send unauthenticated data. By bypassing authentication controls, attackers can inject forged log records, flood alerting systems, or manipulate routing decisions, compromising the authenticity and integrity of ingested logs.","status":"published","published":"2025-12-01T20:38:24.94Z","modified":"2025-12-01T21:42:55.111835Z","updated_at":"2026-11-02T15:28:29.563843Z"}]}}