CVE-2025-59342
MEDIUM NUCLEIesm.sh <136 - Path Traversal
Title source: llmDescription
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.
Exploits (2)
Nuclei Templates (1)
esm.sh <= v136 - Arbitrary File Write via Path Traversal
MEDIUMVERIFIEDby 0x_Akoko
Shodan:
http.html:"esm.sh"
References (4)
Scores
CVSS v4
5.5
EPSS
0.0645
EPSS Percentile
91.1%
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
Details
CWE
CWE-24
Status
published
Products (2)
esm-dev/esm.sh
0 - 136.1Go
esm-dev/esm.sh
<= 136
Published
Sep 17, 2025
Tracked Since
Feb 18, 2026