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Vulnerability record · CVE-2025-34095 · published 10 July 2025

CVE-2025-34095: OS command injection vulnerability

An OS command injection vulnerability exists in Mako Server versions 2.5 and 2.6, specifically within the tutorial interface provided by the examples/save.lsp endpoint. An unauthenticated attacker can send a crafted PUT request containing arbitrary Lua os.execute() code, which is then persisted on disk and triggered via a subsequent GET request to examples/manage.lsp. This allows remote command execution on the underlying operating system, impacting both Windows and Unix-based deployments.

9.3 CVSS 4.0 Critical EPSS 6.3% · top 6.6% CWE-78 · OS command injection Deferred
9.3CVSS 4.0 base score
6.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

An OS command injection vulnerability exists in Mako Server versions 2.5 and 2.6, specifically within the tutorial interface provided by the examples/save.lsp endpoint. An unauthenticated attacker can send a crafted PUT request containing arbitrary Lua os.execute() code, which is then persisted on disk and triggered via a subsequent GET request to examples/manage.lsp. This allows remote command execution on the underlying operating system, impacting both Windows and Unix-based deployments.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/makoserver_cmd_exec.rb
https://vulncheck/advisories/mako-server-rce
https://www.exploit-db.com/exploits/43132

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Source: NIST National Vulnerability Database (record CVE-2025-34095), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.