CVE-2025-12969: Fluent Bit in_forward input plugin does not properly enforce the security.users authentication mechanism under certain…
CVE-2025-12969 · Severity: medium · CVSS 6.5 · Published 2025-11-24
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-12969 being exploited in the wild.
How severe is CVE-2025-12969?
Medium severity, with a CVSS score of 6.5, published 24 November 2025.
Which products and versions are affected?
Treasuredata Fluent Bit. The advisory does not name versions.
Is there a fix for CVE-2025-12969?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-12969?
Check whether you run Treasuredata Fluent Bit. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.