CVE-2025-34095 Mako Server v2.5 and v2.6 OS Command Injection via examples/save.lsp
Unauthenticated attackers can execute arbitrary OS commands via crafted requests to the Mako Server tutorial interface, affecting Windows and Unix deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34095?
CVE-2025-34095 is a critical command injection vulnerability in Real Time Logic Mako Server, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2025-34095?
How do I fix CVE-2025-34095?
No fix has been published for CVE-2025-34095 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-34095 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34095 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-fh7x-m234-3vg3.