CVE-2025-12972
MEDIUM EPSS 46.6%
Published Nov 24, 20257mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Published Nov 24, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago
Description
Fluent Bit out_file plugin does not properly sanitize tag values when deriving output file names. When the File option is omitted, the plugin uses untrusted tag input to construct file paths. This allows attackers with network access to craft tags containing path traversal sequences that cause Fluent Bit to write files outside the intended output directory.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None
Threat Intelligence
EPSS Exploit Probability
46.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-22 Path Traversal Resource Mgmt
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| treasuredata | fluent_bit | 4.1.0 | any |
References 2
- fluentbit.io https://fluentbit.io/blog/2025/10/28/security-vulnerabilities-addressed-in-fluent-bit-v4.1-and-backported-to-v4.0/
- oligo.security https://www.oligo.security/blog/critical-vulnerabilities-in-fluent-bit-expose-cloud-environments-to-remote-takeover
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.