CVE-2025-68271: Unauthenticated Remote Code Execution in openc3-api
Summary OpenC3 COSMOS contains a critical remote code execution vulnerability reachable through the JSON-RPC API. When a JSON-RPC request uses the string form of certain APIs, attacker-controlled parameter text is parsed into values using String#converttovalue. For array-like inputs, converttovalue executes eval().
Because the cmd code path parses the command string before calling authorize(), an unauthenticated attacker can trigger Ruby code execution even though the request ultimately fails authorization (401).
Other sources
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.0 to 6.10.1, OpenC3 COSMOS contains a critical remote code execution vulnerability reachable through the JSON-RPC API. When a JSON-RPC request uses the string form of certain APIs, attacker-controlled parameter text is parsed into values using String#converttovalue. For array-like inputs, converttovalue executes eval(). Because the cmd code path parses the command string before calling authorize(), an unauthenticated attacker can trigger Ruby code execution even though the request ultimately fails authorization (401). This vulnerability is fixed in 6.10.2.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-68271?
CVE-2025-68271 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2025-68271?
To fix CVE-2025-68271, upgrade OpenC3 COSMOS to version 6.10.2 or later.
What software is affected by CVE-2025-68271?
CVE-2025-68271 affects OpenC3 COSMOS versions between 5.0.0 and 6.10.1 inclusive.
Can CVE-2025-68271 be exploited remotely?
Yes, CVE-2025-68271 allows for unauthenticated remote code execution through the JSON-RPC API.
What are the implications of CVE-2025-68271?
Exploitation of CVE-2025-68271 could allow attackers to execute arbitrary code on the affected server.