CVE-2025-59342 (GCVE-0-2025-59342)
Vulnerability from cvelistv5
Published
2025-09-17 17:59
Modified
2025-09-17 18:20
Severity ?
5.5 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
CWE
  • CWE-24 - Path Traversal: '../filedir'
Summary
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.
References
security-advisories@github.comhttps://github.com/esm-dev/esm.sh/blob/main/server/router.go#L116
security-advisories@github.comhttps://github.com/esm-dev/esm.sh/blob/main/server/router.go#L411
security-advisories@github.comhttps://github.com/esm-dev/esm.sh/security/advisories/GHSA-g2h5-cvvr-7gmw
Impacted products
Vendor Product Version
esm-dev esm.sh Version: <= 136
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