CVE-2025-12972

CVE-2025-12972

Published Nov 24, 2025 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Treasuredata
Treasuredata fluent Bit
Weaknesses CWE-22
CPEs cpe:2.3:a:treasuredata:fluent_bit:4.1.0:*:*:*:*:*:*:*
Vendors & Products Treasuredata
Treasuredata fluent Bit
Type Values Removed Values Added
First Time appeared Fluentbit
Fluentbit fluent Bit
Vendors & Products Fluentbit
Fluentbit fluent Bit
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title CVE-2025-12972
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
certcc
Published
Updated
Jan 7, 2026, 3:36 PM
Reserved
Nov 10, 2025, 6:00 PM
Status
Modified
Published
Nov 24, 2025, 3:15 PM
Modified
Oct 8, 2026, 10:10 AM