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How the CVE Works
Thor versions before 1.4.0 improperly sanitize user-supplied input when constructing shell commands within its library functions. An attacker can inject malicious shell metacharacters into input parameters, leading to arbitrary command execution in the context of the application. The vulnerability arises due to insufficient validation before passing arguments to system shell calls. For example, if Thor processes untrusted input via `system()` or backticks without escaping, an attacker could chain commands, manipulate files, or escalate privileges.
DailyCVE Form
Platform: Thor
Version: <1.4.0
Vulnerability: Command Injection
Severity: Low
Date: Jul 20, 2025
Prediction: Patch by Aug 5, 2025
What Undercode Say
Check Thor version
thor --version
Example vulnerable code snippet
system("echo {user_input}")
Mitigation (Ruby)
require 'shellwords'
system("echo {Shellwords.escape(user_input)}")
How Exploit
1. Craft input with `; rm -rf /`
2. Inject via Thor’s CLI or API
3. Trigger shell command execution
Protection from this CVE
- Upgrade to Thor 1.4.0
- Sanitize inputs with `Shellwords.escape`
– Avoid shell calls
Impact
- Arbitrary command execution
- Data loss
- System compromise
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
