CVE-2025-12969

Nov. 25, 2025, 10:16 p.m.

6.5
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.

Product(s) Impacted

Vendor Product Versions
Fluentbit
  • Fluent Bit
  • In Forward Input Plugin
  • *
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a fluentbit fluent_bit / / / / / / / /
a fluentbit in_forward_input_plugin / / / / / / / /

References

https://fluentbit.io/announcements/v4.1.0/

Tags

cret@cert.org
2025-11-24
CVE-2025-12969

CVSS Score

6.5 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: LOW
  • Integrity Impact: LOW
  • Availability Impact: NONE

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

    View Vector String

Timeline

Published: Nov. 24, 2025, 3:15 p.m.
Last Modified: Nov. 25, 2025, 10:16 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

cret@cert.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.