CVE-2025-34095

Mako Server v2.5 and v2.6 OS Command Injection via examples/save.lsp

State: Published
Severity: 9.3 Critical
Published: Jul 10, 2025
Updated: May 14, 2026
Reserved: Apr 15, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	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	VulnCheck

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
Mako ServerReal Time Logic	2.5 through 2.6Affected

References

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/makoserver_cmd_exec.rbexploit
https://www.exploit-db.com/exploits/43132exploit
https://vulncheck/advisories/mako-server-rcethird-party-advisory

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