CVE-2025-59342

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/esm-dev/esm.sh/blob/main/server/router.go#L116
https://github.com/esm-dev/esm.sh/blob/main/server/router.go#L411
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-g2h5-cvvr-7gmw

Configurations

No configuration.

History

17 Sep 2025, 18:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-09-17 18:15

Updated : 2025-09-18 13:43

NVD link : CVE-2025-59342

Mitre link : CVE-2025-59342

CVE.ORG link : CVE-2025-59342

JSON object : View

Products Affected

No product.

CWE

CWE-24

Path Traversal: '../filedir'

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