Vulnerability Details CVE-2025-12969
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.6%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2025-12969
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cpe:2.3:a:treasuredata:fluent_bit:4.1.0