CVE-2025-12969 — MEDIUM (6.5)

Vulnerability 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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Treasuredata	Fluent Bit	4.1.0

Related Weaknesses (CWE)

CWE-306

References

FAQ

What is CVE-2025-12969?

CVE-2025-12969 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...

How severe is CVE-2025-12969?

CVE-2025-12969 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-12969?

Check the references section above for vendor advisories and patch information. Affected products include: Treasuredata Fluent Bit.