CVE-2025-12969
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductTreasuredata Fluent Bit
PublishedNov 24, 2025
First seenNov 24, 2025
Weakness typeCWE-306Missing authentication for critical function
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| treasuredata fluent_bit | 4.1.0 | — |
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