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CVE-2025-65025

Esm Esm.sh path traversal

8.2 HIGHPublic exploitEPSS 0.53%
  1. Published19 Nov 2025

Description

esm.sh is a nobuild content delivery network(CDN) for modern web development. Prior to version 136, the esm.sh CDN service is vulnerable to path traversal during NPM package tarball extraction. An attacker can craft a malicious NPM package containing specially crafted file paths (e.g., package/../../tmp/evil.js). When esm.sh downloads and extracts this package, files may be written to arbitrary locations on the server, escaping the intended extraction directory. This issue has been patched in version 136.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Affected products

Esm Esm.sh< 136

Remediation

Fixed in
Esm Esm.sh≥ 136

References

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Frequently asked

Is CVE-2025-65025 being actively exploited?

CVE-2025-65025 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.53%.

How severe is CVE-2025-65025?

CVE-2025-65025 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2025-65025?

Affected products include Esm Esm.sh.

How do I fix CVE-2025-65025?

Upgrade affected software to a fixed version, for example Esm Esm.sh 136 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-65025 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.