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I. Basic Information for CVE-2025-59342
Vulnerability Information
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Vulnerability Title
esm.sh writes arbitrary files via path traversal in `X-Zone-Id` header
Source: NVD (National Vulnerability Database)
Vulnerability Description
esm.sh is a nobuild content delivery network(CDN) for modern web development. In 136 and earlier, a path-traversal flaw in the handling of the X-Zone-Id HTTP header allows an attacker to cause the application to write files outside the intended storage location. The header value is used to build a filesystem path but is not properly canonicalized or restricted to the application’s storage base directory. As a result, supplying ../ sequences in X-Zone-Id causes files to be written to arbitrary directories. Version 136.1 contains a patch.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
路径遍历：’../filedir’
Source: NVD (National Vulnerability Database)
Vulnerability Title
esm.sh 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
esm.sh是esm.sh开源的一个内容分发网络。 esm.sh 136及之前版本存在安全漏洞，该漏洞源于X-Zone-Id HTTP标头处理不当，可能导致路径遍历攻击。
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
VendorProductAffected VersionsCPESubscribe
esm-devesm.sh <= 136 -
II. Public POCs for CVE-2025-59342
#POC DescriptionSource LinkShenlong Link
1Exploit Path Traversal in esm-dev https://github.com/byteReaper77/CVE-2025-59342POC Details
2esm.sh <= 136 contains a path traversal caused by improper canonicalization of the X-Zone-Id HTTP header, letting attackers write files outside the intended storage directory, exploit requires crafted header input. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-59342.yamlPOC Details
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III. Intelligence Information for CVE-2025-59342
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IV. Related Vulnerabilities
Same product: esm.sh
Same vendor: esm-dev
Same weakness: CWE-24
V. Comments for CVE-2025-59342

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