CVE-2025-59049: Mockoon has a Path Traversal and LFI in the static file serving endpoint

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-09-10 · updated 2026-06-17
Weakness: CWE-22

Description

Mockoon provides way to design and run mock APIs. Prior to version 9.2.0, a mock API configuration for static file serving follows the same approach presented in the documentation page, where the server filename is generated via templating features from user input is vulnerable to Path Traversal and LFI, allowing an attacker to get any file in the mock server filesystem. The issue may be particularly relevant in cloud hosted server instances. Version 9.2.0 fixes the issue.

Affected products

mockoon: before 9.2.0

References

https://github.com/mockoon/mockoon/blob/1ed31c4059d7f757f6cb2a43e10dc81b0d9c55a9/packages/commons-server/src/libs/server/server.ts#L1400
https://github.com/mockoon/mockoon/blob/1ed31c4059d7f757f6cb2a43e10dc81b0d9c55a9/packages/commons-server/src/libs/server/server.ts#L1551
https://github.com/mockoon/mockoon/commit/c7f6e23e87dc3b8cc44e5802af046200a797bd2e
https://github.com/mockoon/mockoon/security/advisories/GHSA-w7f9-wqc4-3wxr

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