CVE-2025-12972
Quick assessment
Affected
FluentBit Fluent Bit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Fluent Bit是Fluent开源的一款使用C语言编写的开源日志处理和分析系统。 Fluent Bit存在安全漏洞，该漏洞源于未正确清理标签值，可能导致路径遍历攻击，使文件写入非预期目录。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-12972
Vulnerability Information
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Vulnerability Title
CVE-2025-12972
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Fluent Bit 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fluent Bit是Fluent开源的一款使用C语言编写的开源日志处理和分析系统。 Fluent Bit存在安全漏洞，该漏洞源于未正确清理标签值，可能导致路径遍历攻击，使文件写入非预期目录。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| FluentBit | Fluent Bit | 0 ~ 4.0.12 | - |
|
II. Public POCs for CVE-2025-12972
| # | POC Description | Source Link | Shenlong Link |
|---|
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Security Blog Posts for CVE-2025-12972 (2)
Same Patch Batch · FluentBit · 2025-11-24 · 5 CVEs total
| CVE-2025-12978 | CVE-2025-12978 | |
| CVE-2025-12969 | CVE-2025-12969 | |
| CVE-2025-12977 | CVE-2025-12977 | |
| CVE-2025-12970 | CVE-2025-12970 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-12972
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